diff --git a/backend/app/api/v1/endpoints/tasks.py b/backend/app/api/v1/endpoints/tasks.py
index c98627d..88c3211 100644
--- a/backend/app/api/v1/endpoints/tasks.py
+++ b/backend/app/api/v1/endpoints/tasks.py
@@ -102,6 +102,24 @@ async def complete_task_endpoint(
     )
 
 
+# ============================================================
+# 核心业务 0：结束分支（终止当前节点，不创建下游）
+# ============================================================
+
+@router.post("/{task_id}/end", response_model=TaskResponse)
+async def end_task_endpoint(
+    task_id: str,
+    operator_id: str | None = Query(None),
+    db: AsyncSession = Depends(get_db),
+):
+    """
+    **结束当前分支：标记任务为 COMPLETED，不创建下游任务。**
+
+    用于工人认为工序已完结、无需转交下一人的场景。
+    """
+    return await task_service.end_task(db, uuid.UUID(task_id), operator_id)
+
+
 # ============================================================
 # 核心业务 1：确认接收 (PENDING → WIP)
 # ============================================================
diff --git a/backend/app/services/task_service.py b/backend/app/services/task_service.py
index 55fdef8..32f1eba 100644
--- a/backend/app/services/task_service.py
+++ b/backend/app/services/task_service.py
@@ -223,6 +223,36 @@ async def get_all_tasks(
     return TaskListResponse(tasks=all_tasks, total=len(all_tasks))
 
 
+# ============================================================
+# 核心业务 0：结束分支（终止当前节点）
+# ============================================================
+
+async def end_task(
+    db: AsyncSession, task_id: uuid.UUID, operator_id: str | None = None
+) -> TaskResponse:
+    """
+    结束当前分支：标记任务为 COMPLETED，不创建下游任务。
+    用于工序已完结、无需转交下一人的场景。
+    """
+    task = await _get_task_or_404(db, task_id)
+
+    if task.status == TASK_STATUS_COMPLETED:
+        raise HTTPException(status_code=409, detail="此分支已经结束")
+    if task.status == TASK_STATUS_PENDING:
+        raise HTTPException(status_code=409, detail="请先接收任务再结束分支")
+
+    now = get_beijing_time()
+    task.status = TASK_STATUS_COMPLETED
+    task.completed_at = now
+
+    await _create_task_log(db, task_id, action_type="end",
+        operator_id=operator_id, remark=f"分支「{task.task_name}」已终止（无下游）")
+
+    await db.commit()
+    await db.refresh(task)
+    return _to_response(task)
+
+
 # ============================================================
 # 核心业务 1：确认接收 (PENDING → WIP)
 # ============================================================
diff --git a/track-uniapp/src/pages/scan/detail.vue b/track-uniapp/src/pages/scan/detail.vue
index f0afb19..8101e10 100644
--- a/track-uniapp/src/pages/scan/detail.vue
+++ b/track-uniapp/src/pages/scan/detail.vue
@@ -140,6 +140,10 @@
           @tap="handleTaskAction({ task: currentTask, type: 'record' })">
           📝 记录/拍照
         </button>
+        <button v-if="currentTask.status === 'WIP'" class="footer-btn footer-end"
+          @tap="handleTaskAction({ task: currentTask, type: 'end' })">
+          🏁 结束分支
+        </button>
         <button v-if="currentTask.status === 'PENDING'" class="footer-btn footer-receive"
           @tap="handleTaskAction({ task: currentTask, type: 'receive' })">
           ✅ 接收任务
@@ -725,6 +729,7 @@ export default {
     async handleTaskAction({ task, type, record }) {
       if (type === "record") { this.openRecordPopup(task); return; }
       if (type === "deleteRecord") { this.doDeleteRecord(record); return; }
+      if (type === "end") { this.confirmEndBranch(task); return; }
 
       // 转交时异步拉取真实工序和用户数据
       if (type === "transfer") {
@@ -747,6 +752,23 @@ export default {
     handleViewRecords(task) {
       uni.navigateTo({ url: `/pages/scan/records?taskId=${task.id}` });
     },
+    confirmEndBranch(task) {
+      uni.showModal({
+        title: "结束当前分支",
+        content: `确定结束「${task.task_name}」吗？\n此分支将标记为已完成，不会创建下游任务。`,
+        confirmText: "确定结束",
+        confirmColor: "#f59e0b",
+        success: (res) => { if (res.confirm) this.doEndBranch(task); },
+      });
+    },
+    async doEndBranch(task) {
+      try {
+        const opId = this.currentUsername || this.currentUserId;
+        await post(`/tasks/${task.id}/end?operator_id=${encodeURIComponent(opId)}`);
+        uni.showToast({ title: "分支已结束", icon: "success" });
+        this.doQuery(this.product.serial_number);
+      } catch {}
+    },
     onSwiperChange(e) {
       this.swiperCurrent = e.detail.current;
     },
@@ -996,6 +1018,7 @@ export default {
 .footer-record { background: #eff6ff; color: #2563eb; }
 .footer-receive { background: #dbeafe; color: #1d4ed8; }
 .footer-reject { background: #fce4ec; color: #dc2626; }
+.footer-end { background: #fef3c7; color: #b45309; }
 
 /* Picker 选择器 */
 .form-item { margin: 10px 0; }