diff --git a/apps/backend/src/db/migrations/109_work_order_material_link.sql b/apps/backend/src/db/migrations/109_work_order_material_link.sql
new file mode 100644
index 00000000..1b592839
--- /dev/null
+++ b/apps/backend/src/db/migrations/109_work_order_material_link.sql
@@ -0,0 +1,54 @@
+-- 109_work_order_material_link.sql
+-- 接单工单「一次性补资料链接」。
+--
+-- 背景：客服在接单平台给待完善/未分配的工单生成一条客户可访问的链接，
+-- 客户无需登录即可补充资料字段与买家主页截图；成功提交一次后链接立即失效，
+-- 工单转为「未分配」，需要修改时必须由客服重新生成链接。
+--
+-- 独立于 claim_tokens：claim_tokens 强绑定 fulfillment_tasks，
+-- 而这里绑定 work_orders，生命周期与补资料动作一致。
+
+CREATE TABLE IF NOT EXISTS work_order_material_links (
+  id BIGSERIAL PRIMARY KEY,
+  work_order_id BIGINT NOT NULL REFERENCES work_orders(id) ON DELETE CASCADE,
+  token TEXT NOT NULL UNIQUE,
+  status TEXT NOT NULL DEFAULT 'active',
+  expires_at TIMESTAMPTZ NOT NULL,
+  used_at TIMESTAMPTZ,
+  created_by TEXT NOT NULL DEFAULT '',
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  CONSTRAINT work_order_material_links_status_check
+    CHECK (status IN ('active', 'used', 'expired', 'revoked'))
+);
+
+-- 兼容极端情况下先建表但约束未建成功的库（正常新库会走上面的内联约束）。
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM pg_constraint
+    WHERE conname = 'work_order_material_links_status_check'
+  ) THEN
+    ALTER TABLE work_order_material_links
+      ADD CONSTRAINT work_order_material_links_status_check
+      CHECK (status IN ('active', 'used', 'expired', 'revoked'));
+  END IF;
+END $$;
+
+CREATE INDEX IF NOT EXISTS idx_work_order_material_links_order
+  ON work_order_material_links (work_order_id, created_at DESC);
+
+-- 一个工单同时最多一条未使用链接；重新生成前先把旧 active 置为 revoked。
+CREATE UNIQUE INDEX IF NOT EXISTS idx_work_order_material_links_active
+  ON work_order_material_links (work_order_id)
+  WHERE status = 'active';
+
+COMMENT ON TABLE work_order_material_links IS
+  '接单工单一次性补资料链接：客户凭 token 提交一次资料后失效';
+COMMENT ON COLUMN work_order_material_links.token IS
+  'URL 安全随机 token；只在生成/复制链接时返回给后台';
+COMMENT ON COLUMN work_order_material_links.status IS
+  'active 可用 / used 已提交 / expired 已过期 / revoked 已撤销';
+COMMENT ON COLUMN work_order_material_links.created_by IS
+  '生成链接的后台操作人展示名，用于审计';
diff --git a/apps/backend/src/db/migrations/109_after_sales_withdraw_deduction.sql b/apps/backend/src/db/migrations/112_after_sales_withdraw_deduction.sql
similarity index 96%
rename from apps/backend/src/db/migrations/109_after_sales_withdraw_deduction.sql
rename to apps/backend/src/db/migrations/112_after_sales_withdraw_deduction.sql
index 0f78100b..e3707ac9 100644
--- a/apps/backend/src/db/migrations/109_after_sales_withdraw_deduction.sql
+++ b/apps/backend/src/db/migrations/112_after_sales_withdraw_deduction.sql
@@ -1,4 +1,4 @@
--- 109_after_sales_withdraw_deduction.sql
+-- 112_after_sales_withdraw_deduction.sql
 --
 -- 售后追缴要能把「提现冻结中」的钱一并扣掉。
 --