diff --git a/backend/Dockerfile b/backend/Dockerfile
index a1f3fbf..e1375c9 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -40,6 +40,7 @@ COPY app/ ./app/
 COPY alembic/ ./alembic/
 COPY alembic.ini .
 COPY pyproject.toml .
+COPY scripts/ ./scripts/
 
 # 创建非 root 用户
 RUN groupadd -r miaosi && useradd -r -g miaosi -d /app -s /sbin/nologin miaosi \
@@ -53,4 +54,5 @@ EXPOSE 8000
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
     CMD curl -f http://localhost:8000/health || exit 1
 
+ENTRYPOINT ["./scripts/entrypoint.sh"]
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
diff --git a/backend/scripts/__init__.py b/backend/scripts/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/scripts/entrypoint.sh b/backend/scripts/entrypoint.sh
new file mode 100755
index 0000000..8c141cf
--- /dev/null
+++ b/backend/scripts/entrypoint.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+# Docker 容器入口脚本
+# 先初始化数据库，再启动应用
+
+set -e
+
+echo "=== 秒思智能审核平台 - 启动中 ==="
+
+# 运行数据库迁移
+echo "运行数据库迁移..."
+alembic upgrade head
+
+# 填充种子数据
+echo "填充种子数据..."
+python -m scripts.seed
+
+# 启动应用
+echo "启动应用..."
+exec "$@"
diff --git a/backend/scripts/init_db.sh b/backend/scripts/init_db.sh
new file mode 100755
index 0000000..8e38ac4
--- /dev/null
+++ b/backend/scripts/init_db.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+# 数据库初始化脚本
+# 运行 Alembic 迁移 + 填充种子数据
+
+set -e
+
+echo "=== 数据库初始化 ==="
+
+echo "1. 运行 Alembic 迁移..."
+alembic upgrade head
+
+echo "2. 填充种子数据..."
+python -m scripts.seed
+
+echo "=== 数据库初始化完成 ==="
diff --git a/backend/scripts/seed.py b/backend/scripts/seed.py
new file mode 100644
index 0000000..3b76978
--- /dev/null
+++ b/backend/scripts/seed.py
@@ -0,0 +1,454 @@
+"""
+种子数据脚本
+创建 demo 用户、组织关系、项目、Brief、任务、规则数据
+支持幂等运行：已存在则跳过
+
+用法：
+  cd backend && python -m scripts.seed
+"""
+import asyncio
+import sys
+from datetime import datetime, timedelta, timezone
+
+from sqlalchemy import select, insert, text
+from sqlalchemy.ext.asyncio import AsyncSession
+
+# 确保能找到 app 模块
+sys.path.insert(0, ".")
+
+from app.database import AsyncSessionLocal
+from app.models import (
+    User, UserRole, Brand, Agency, Creator,
+    Project, Task, TaskStage, TaskStatus, Brief,
+    ForbiddenWord, WhitelistItem, Competitor, AIConfig, Tenant,
+    Message,
+    brand_agency_association, agency_creator_association,
+    project_agency_association,
+)
+from app.services.auth import hash_password
+
+
+# ============================================================
+# 固定 ID，方便前端 mock 数据对齐和反复运行幂等检查
+# ============================================================
+BRAND_USER_ID = "U100001"
+AGENCY_USER_ID = "U100002"
+CREATOR_USER_ID = "U100003"
+
+BRAND_ID = "BR100001"
+AGENCY_ID = "AG100001"
+CREATOR_ID = "CR100001"
+
+TENANT_ID = BRAND_ID  # 品牌方 = 租户
+
+PROJECT_ID = "PJ100001"
+BRIEF_ID = "BF100001"
+
+TASK_IDS = ["TK100001", "TK100002", "TK100003", "TK100004"]
+
+PASSWORD_HASH = hash_password("demo123")
+
+NOW = datetime.now(timezone.utc)
+
+
+async def seed_data() -> None:
+    async with AsyncSessionLocal() as db:
+        # ========== 幂等检查 ==========
+        result = await db.execute(
+            select(User).where(User.email == "brand@demo.com")
+        )
+        if result.scalar_one_or_none():
+            print("✅ 种子数据已存在，跳过创建")
+            return
+
+        print("🌱 开始创建种子数据...")
+
+        # ========== 1. Demo 用户 ==========
+        brand_user = User(
+            id=BRAND_USER_ID,
+            email="brand@demo.com",
+            password_hash=PASSWORD_HASH,
+            name="秒思科技",
+            role=UserRole.BRAND,
+            is_active=True,
+            is_verified=True,
+        )
+        agency_user = User(
+            id=AGENCY_USER_ID,
+            email="agency@demo.com",
+            password_hash=PASSWORD_HASH,
+            name="星辰传媒",
+            role=UserRole.AGENCY,
+            is_active=True,
+            is_verified=True,
+        )
+        creator_user = User(
+            id=CREATOR_USER_ID,
+            email="creator@demo.com",
+            password_hash=PASSWORD_HASH,
+            name="李小红",
+            role=UserRole.CREATOR,
+            is_active=True,
+            is_verified=True,
+        )
+        db.add_all([brand_user, agency_user, creator_user])
+        await db.flush()
+        print("  ✓ 用户已创建: brand@demo.com / agency@demo.com / creator@demo.com")
+
+        # ========== 2. 组织实体 ==========
+        brand = Brand(
+            id=BRAND_ID,
+            user_id=BRAND_USER_ID,
+            name="秒思科技",
+            description="秒思科技是一家专注于 AI 内容合规的科技公司",
+            contact_name="张经理",
+            contact_phone="13800138000",
+            contact_email="brand@demo.com",
+            final_review_enabled=True,
+            is_active=True,
+        )
+        agency = Agency(
+            id=AGENCY_ID,
+            user_id=AGENCY_USER_ID,
+            name="星辰传媒",
+            description="星辰传媒是一家专业的内容营销代理商",
+            contact_name="王总监",
+            contact_phone="13900139000",
+            contact_email="agency@demo.com",
+            force_pass_enabled=True,
+            is_active=True,
+        )
+        creator = Creator(
+            id=CREATOR_ID,
+            user_id=CREATOR_USER_ID,
+            name="李小红",
+            bio="美妆博主，专注护肤分享，全网粉丝 50 万+",
+            douyin_account="lixiaohong_dy",
+            xiaohongshu_account="lixiaohong_xhs",
+            is_active=True,
+        )
+        db.add_all([brand, agency, creator])
+        await db.flush()
+        print("  ✓ 组织已创建: 秒思科技 / 星辰传媒 / 李小红")
+
+        # ========== 3. 租户（兼容旧表） ==========
+        tenant = Tenant(
+            id=TENANT_ID,
+            name="秒思科技",
+            is_active=True,
+        )
+        db.add(tenant)
+        await db.flush()
+        print("  ✓ 租户已创建: 秒思科技")
+
+        # ========== 4. 组织关联关系 ==========
+        await db.execute(
+            insert(brand_agency_association).values(
+                brand_id=BRAND_ID,
+                agency_id=AGENCY_ID,
+                is_active=True,
+            )
+        )
+        await db.execute(
+            insert(agency_creator_association).values(
+                agency_id=AGENCY_ID,
+                creator_id=CREATOR_ID,
+                is_active=True,
+            )
+        )
+        await db.flush()
+        print("  ✓ 组织关系已建立: 品牌方 → 代理商 → 达人")
+
+        # ========== 5. 项目 ==========
+        project = Project(
+            id=PROJECT_ID,
+            brand_id=BRAND_ID,
+            name="2026春季新品推广",
+            description="春季新品防晒霜推广活动，面向 18-35 岁女性用户，重点投放抖音和小红书平台",
+            start_date=NOW,
+            deadline=NOW + timedelta(days=30),
+            status="active",
+        )
+        db.add(project)
+        await db.flush()
+
+        # 项目 → 代理商关联
+        await db.execute(
+            insert(project_agency_association).values(
+                project_id=PROJECT_ID,
+                agency_id=AGENCY_ID,
+                is_active=True,
+            )
+        )
+        await db.flush()
+        print("  ✓ 项目已创建: 2026春季新品推广")
+
+        # ========== 6. Brief ==========
+        brief = Brief(
+            id=BRIEF_ID,
+            project_id=PROJECT_ID,
+            selling_points=[
+                {"content": "SPF50+ PA++++，超强防晒", "required": True},
+                {"content": "轻薄不油腻，适合日常通勤", "required": True},
+                {"content": "添加玻尿酸成分，防晒同时保湿", "required": False},
+            ],
+            blacklist_words=[
+                {"word": "最好", "reason": "绝对化用语"},
+                {"word": "第一", "reason": "绝对化用语"},
+                {"word": "纯天然", "reason": "虚假宣传"},
+            ],
+            competitors=["安耐晒", "怡思丁", "薇诺娜"],
+            brand_tone="年轻、活力、专业、可信赖",
+            min_duration=30,
+            max_duration=60,
+            other_requirements="请在视频中展示产品实际使用效果，包含户外场景拍摄",
+        )
+        db.add(brief)
+        await db.flush()
+        print("  ✓ Brief 已创建")
+
+        # ========== 7. 示例任务（4 种阶段） ==========
+        tasks = [
+            # TK-001: 等待上传脚本
+            Task(
+                id=TASK_IDS[0],
+                project_id=PROJECT_ID,
+                agency_id=AGENCY_ID,
+                creator_id=CREATOR_ID,
+                name="春季防晒霜种草视频(1)",
+                sequence=1,
+                stage=TaskStage.SCRIPT_UPLOAD,
+            ),
+            # TK-002: 脚本等待代理商审核
+            Task(
+                id=TASK_IDS[1],
+                project_id=PROJECT_ID,
+                agency_id=AGENCY_ID,
+                creator_id=CREATOR_ID,
+                name="春季防晒霜种草视频(2)",
+                sequence=2,
+                stage=TaskStage.SCRIPT_AGENCY_REVIEW,
+                script_file_url="https://example.com/scripts/demo-script.pdf",
+                script_file_name="防晒霜种草脚本v2.pdf",
+                script_uploaded_at=NOW - timedelta(hours=2),
+                script_ai_score=85,
+                script_ai_result={
+                    "score": 85,
+                    "summary": "脚本整体符合要求，卖点覆盖充分",
+                    "issues": [
+                        {"type": "soft_warning", "content": "建议增加产品成分说明"},
+                    ],
+                },
+                script_ai_reviewed_at=NOW - timedelta(hours=1),
+            ),
+            # TK-003: 脚本已通过，等待上传视频
+            Task(
+                id=TASK_IDS[2],
+                project_id=PROJECT_ID,
+                agency_id=AGENCY_ID,
+                creator_id=CREATOR_ID,
+                name="春季防晒霜种草视频(3)",
+                sequence=3,
+                stage=TaskStage.VIDEO_UPLOAD,
+                script_file_url="https://example.com/scripts/demo-script-3.pdf",
+                script_file_name="防晒霜种草脚本v3.pdf",
+                script_uploaded_at=NOW - timedelta(days=2),
+                script_ai_score=92,
+                script_ai_result={
+                    "score": 92,
+                    "summary": "脚本质量优秀，完全符合 Brief 要求",
+                    "issues": [],
+                },
+                script_ai_reviewed_at=NOW - timedelta(days=2),
+                script_agency_status=TaskStatus.PASSED,
+                script_agency_comment="脚本内容不错，可以进入拍摄",
+                script_agency_reviewer_id=AGENCY_USER_ID,
+                script_agency_reviewed_at=NOW - timedelta(days=1),
+                script_brand_status=TaskStatus.PASSED,
+                script_brand_comment="同意",
+                script_brand_reviewer_id=BRAND_USER_ID,
+                script_brand_reviewed_at=NOW - timedelta(days=1),
+            ),
+            # TK-004: 已完成
+            Task(
+                id=TASK_IDS[3],
+                project_id=PROJECT_ID,
+                agency_id=AGENCY_ID,
+                creator_id=CREATOR_ID,
+                name="春季防晒霜种草视频(4)",
+                sequence=4,
+                stage=TaskStage.COMPLETED,
+                script_file_url="https://example.com/scripts/demo-script-4.pdf",
+                script_file_name="防晒霜种草脚本v4.pdf",
+                script_uploaded_at=NOW - timedelta(days=7),
+                script_ai_score=90,
+                script_ai_result={"score": 90, "summary": "符合要求", "issues": []},
+                script_ai_reviewed_at=NOW - timedelta(days=7),
+                script_agency_status=TaskStatus.PASSED,
+                script_agency_comment="通过",
+                script_agency_reviewer_id=AGENCY_USER_ID,
+                script_agency_reviewed_at=NOW - timedelta(days=6),
+                script_brand_status=TaskStatus.PASSED,
+                script_brand_comment="通过",
+                script_brand_reviewer_id=BRAND_USER_ID,
+                script_brand_reviewed_at=NOW - timedelta(days=6),
+                video_file_url="https://example.com/videos/demo-video-4.mp4",
+                video_file_name="防晒霜种草视频v4.mp4",
+                video_duration=45,
+                video_uploaded_at=NOW - timedelta(days=5),
+                video_ai_score=88,
+                video_ai_result={"score": 88, "summary": "视频质量良好", "issues": []},
+                video_ai_reviewed_at=NOW - timedelta(days=5),
+                video_agency_status=TaskStatus.PASSED,
+                video_agency_comment="视频效果好",
+                video_agency_reviewer_id=AGENCY_USER_ID,
+                video_agency_reviewed_at=NOW - timedelta(days=4),
+                video_brand_status=TaskStatus.PASSED,
+                video_brand_comment="终审通过",
+                video_brand_reviewer_id=BRAND_USER_ID,
+                video_brand_reviewed_at=NOW - timedelta(days=3),
+            ),
+        ]
+        db.add_all(tasks)
+        await db.flush()
+        print("  ✓ 任务已创建: TK100001~TK100004 (4种阶段)")
+
+        # ========== 8. 规则数据 ==========
+        forbidden_words = [
+            ForbiddenWord(id="FW100001", tenant_id=TENANT_ID, word="假药", category="法规违禁", severity="high"),
+            ForbiddenWord(id="FW100002", tenant_id=TENANT_ID, word="虚假宣传", category="法规违禁", severity="high"),
+            ForbiddenWord(id="FW100003", tenant_id=TENANT_ID, word="最好", category="绝对化用语", severity="medium"),
+            ForbiddenWord(id="FW100004", tenant_id=TENANT_ID, word="第一", category="绝对化用语", severity="medium"),
+            ForbiddenWord(id="FW100005", tenant_id=TENANT_ID, word="纯天然", category="虚假宣传", severity="medium"),
+        ]
+        db.add_all(forbidden_words)
+        await db.flush()
+        print("  ✓ 违禁词已创建: 5 条")
+
+        competitors = [
+            Competitor(id="CP100001", tenant_id=TENANT_ID, brand_id=BRAND_ID, name="安耐晒", keywords=["安耐晒", "ANESSA", "资生堂防晒"]),
+            Competitor(id="CP100002", tenant_id=TENANT_ID, brand_id=BRAND_ID, name="怡思丁", keywords=["怡思丁", "ISDIN"]),
+            Competitor(id="CP100003", tenant_id=TENANT_ID, brand_id=BRAND_ID, name="薇诺娜", keywords=["薇诺娜", "WINONA"]),
+        ]
+        db.add_all(competitors)
+        await db.flush()
+        print("  ✓ 竞品已创建: 3 条")
+
+        whitelist_items = [
+            WhitelistItem(id="WL100001", tenant_id=TENANT_ID, brand_id=BRAND_ID, term="SPF50+", reason="产品实际参数，非夸大宣传"),
+            WhitelistItem(id="WL100002", tenant_id=TENANT_ID, brand_id=BRAND_ID, term="PA++++", reason="产品实际参数，非夸大宣传"),
+        ]
+        db.add_all(whitelist_items)
+        await db.flush()
+        print("  ✓ 白名单已创建: 2 条")
+
+        # ========== 9. AI 配置（模板） ==========
+        ai_config = AIConfig(
+            tenant_id=TENANT_ID,
+            provider="oneapi",
+            base_url="https://api.example.com/v1",
+            api_key_encrypted="demo-placeholder-key",
+            models={"text": "gpt-4o", "vision": "gpt-4o", "audio": "whisper-1"},
+            temperature=0.7,
+            max_tokens=2000,
+            is_configured=False,
+        )
+        db.add(ai_config)
+        await db.flush()
+        print("  ✓ AI 配置模板已创建")
+
+        # ========== 10. 示例消息 ==========
+        messages = [
+            # 达人消息
+            Message(
+                id="MSG100001",
+                user_id=CREATOR_USER_ID,
+                type="new_task",
+                title="新任务分配",
+                content="您有新的任务「春季防晒霜种草视频(1)」，来自项目「2026春季新品推广」",
+                is_read=False,
+                related_task_id=TASK_IDS[0],
+                related_project_id=PROJECT_ID,
+                sender_name="星辰传媒",
+            ),
+            Message(
+                id="MSG100002",
+                user_id=CREATOR_USER_ID,
+                type="pass",
+                title="脚本审核通过",
+                content="您的任务「春季防晒霜种草视频(3)」脚本已被通过",
+                is_read=True,
+                related_task_id=TASK_IDS[2],
+                sender_name="星辰传媒",
+            ),
+            Message(
+                id="MSG100003",
+                user_id=CREATOR_USER_ID,
+                type="system_notice",
+                title="系统通知",
+                content="平台违禁词库已更新，请在创作时注意避免使用新增的违禁词",
+                is_read=True,
+            ),
+            # 代理商消息
+            Message(
+                id="MSG100004",
+                user_id=AGENCY_USER_ID,
+                type="new_task",
+                title="新脚本提交",
+                content="达人「李小红」提交了「春季防晒霜种草视频(2)」脚本，请及时审核",
+                is_read=False,
+                related_task_id=TASK_IDS[1],
+                sender_name="李小红",
+            ),
+            Message(
+                id="MSG100005",
+                user_id=AGENCY_USER_ID,
+                type="pass",
+                title="品牌终审通过",
+                content="任务「春季防晒霜种草视频(4)」已通过品牌方终审",
+                is_read=True,
+                related_task_id=TASK_IDS[3],
+                sender_name="秒思科技",
+            ),
+            # 品牌方消息
+            Message(
+                id="MSG100006",
+                user_id=BRAND_USER_ID,
+                type="new_task",
+                title="脚本待终审",
+                content="「星辰传媒」的达人「李小红」脚本已通过代理商审核，请进行终审",
+                is_read=False,
+                related_task_id=TASK_IDS[1],
+                sender_name="星辰传媒",
+            ),
+            Message(
+                id="MSG100007",
+                user_id=BRAND_USER_ID,
+                type="system_notice",
+                title="项目创建成功",
+                content="您的项目「2026春季新品推广」已创建成功",
+                is_read=True,
+                related_project_id=PROJECT_ID,
+            ),
+        ]
+        db.add_all(messages)
+        await db.flush()
+        print("  ✓ 示例消息已创建: 7 条 (达人3 + 代理商2 + 品牌方2)")
+
+        # ========== 提交 ==========
+        await db.commit()
+        print("\n🎉 种子数据创建完成！")
+        print("=" * 50)
+        print("Demo 账号:")
+        print("  品牌方: brand@demo.com  / demo123")
+        print("  代理商: agency@demo.com / demo123")
+        print("  达人:   creator@demo.com / demo123")
+        print("=" * 50)
+
+
+def main():
+    asyncio.run(seed_data())
+
+
+if __name__ == "__main__":
+    main()
diff --git a/backend/scripts/start-dev.sh b/backend/scripts/start-dev.sh
index 05310f2..353f400 100755
--- a/backend/scripts/start-dev.sh
+++ b/backend/scripts/start-dev.sh
@@ -23,6 +23,10 @@ sleep 5
 echo "运行数据库迁移..."
 alembic upgrade head
 
+# 填充种子数据
+echo "填充种子数据..."
+python -m scripts.seed
+
 echo ""
 echo "=== 基础服务已启动 ==="
 echo "PostgreSQL: localhost:5432"