diff --git a/backend/app/api/visits.py b/backend/app/api/visits.py
index d38ad12..001388c 100644
--- a/backend/app/api/visits.py
+++ b/backend/app/api/visits.py
@@ -161,17 +161,11 @@ async def create_visit(
         db.add(customer)
 
     # Auto-complete matching work plans for this customer
-    from app.models.work_plan import WorkPlan
-    plans_result = await db.execute(
-        select(WorkPlan).where(
-            WorkPlan.customer_id == data.customer_id,
-            WorkPlan.status == "计划中",
-            WorkPlan.plan_date <= parse_date(data.visit_date),
-        )
+    from app.services.visits import auto_complete_work_plans
+    await auto_complete_work_plans(
+        db, data.customer_id, parse_date(data.visit_date),
+        current_user["name"], "拜访自动完成",
     )
-    for plan in plans_result.scalars().all():
-        plan.status = "已完成"
-        append_entry(plan, current_user["name"], [{"field": "status", "from": "计划中", "to": "已完成", "reason": "拜访自动完成"}])
 
     # Create draft copies for companions
     for companion_id in data.companions:
@@ -237,6 +231,15 @@ async def update_visit(
 
     await db.commit()
     await db.refresh(visit)
+
+    # Auto-complete matching work plans after visit update
+    from app.services.visits import auto_complete_work_plans
+    await auto_complete_work_plans(
+        db, visit.customer_id, visit.visit_date,
+        current_user["name"], "拜访更新自动完成",
+    )
+    await db.commit()
+
     return await _enrich_visit(visit, db)
 
 
diff --git a/backend/app/services/excel_import.py b/backend/app/services/excel_import.py
index 5cad36b..646c7d5 100644
--- a/backend/app/services/excel_import.py
+++ b/backend/app/services/excel_import.py
@@ -203,6 +203,13 @@ async def import_from_excel(db: AsyncSession, file_bytes: bytes, manager_id: uui
                 db.add(visit)
                 stats["visits"] += 1
 
+                # Auto-complete matching work plans
+                from app.services.visits import auto_complete_work_plans
+                await auto_complete_work_plans(
+                    db, customer_id, visit_date,
+                    mgr_name, "旧周报导入自动完成",
+                )
+
                 # Update customer's last_visit_date for light board
                 cust = await db.get(Customer, customer_id)
                 if cust and (not cust.last_visit_date or visit_date > cust.last_visit_date):
diff --git a/backend/app/services/scheduler.py b/backend/app/services/scheduler.py
index 33e192c..98d8374 100644
--- a/backend/app/services/scheduler.py
+++ b/backend/app/services/scheduler.py
@@ -168,9 +168,33 @@ async def check_overdue_plans(db: AsyncSession) -> dict:
 
         await wecom_client.send_text_message([user.wecom_userid], content)
 
+    # ── Auto-cancel overdue plans that have no matching visit ──
+    from app.utils.edit_log import append_entry as append_edit_log
+    auto_cancelled = 0
+    for plan in overdue:
+        has_visit = await db.execute(
+            select(Visit).where(
+                Visit.customer_id == plan.customer_id,
+                Visit.visit_date >= plan.plan_date,
+            )
+        )
+        if not has_visit.scalar():
+            plan.status = "已取消"
+            append_edit_log(plan, "系统", [{
+                "field": "status",
+                "from": "计划中",
+                "to": "已取消",
+                "reason": "逾期自动取消",
+            }])
+            auto_cancelled += 1
+
+    if auto_cancelled:
+        await db.commit()
+
     return {
         "status": "ok",
         "date": str(today),
         "overdue": len(overdue),
+        "auto_cancelled": auto_cancelled,
         "managers_affected": len(by_manager),
     }
diff --git a/backend/app/services/visits.py b/backend/app/services/visits.py
new file mode 100644
index 0000000..9808483
--- /dev/null
+++ b/backend/app/services/visits.py
@@ -0,0 +1,40 @@
+"""Visit service — shared logic for visit creation, update, and import."""
+
+from uuid import UUID
+from datetime import date
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from app.models.work_plan import WorkPlan
+from app.utils.edit_log import append_entry
+
+
+async def auto_complete_work_plans(
+    db: AsyncSession,
+    customer_id: UUID,
+    visit_date: date,
+    editor_name: str,
+    reason: str = "拜访自动完成",
+) -> int:
+    """Auto-complete matching work plans when a visit is created/updated/imported.
+
+    Matches by: same customer_id + status=="计划中" + plan_date <= visit_date.
+    Returns the number of plans completed.
+    """
+    plans_result = await db.execute(
+        select(WorkPlan).where(
+            WorkPlan.customer_id == customer_id,
+            WorkPlan.status == "计划中",
+            WorkPlan.plan_date <= visit_date,
+        )
+    )
+    count = 0
+    for plan in plans_result.scalars().all():
+        plan.status = "已完成"
+        append_entry(plan, editor_name, [{
+            "field": "status",
+            "from": "计划中",
+            "to": "已完成",
+            "reason": reason,
+        }])
+        count += 1
+    return count