diff --git a/furniture-3d-system/.gitignore b/furniture-3d-system/.gitignore
index 33f06d95..04c50df9 100644
--- a/furniture-3d-system/.gitignore
+++ b/furniture-3d-system/.gitignore
@@ -74,3 +74,6 @@ local-packages/npm-cache/cache/_logs/
 
 # 脚本监控 Agent 本机凭据
 agents/script-monitor/config.json
+
+# 下载中心本地运行时产物
+.download-center/
diff --git a/furniture-3d-system/src/server/services/download-center/download-center.service.ts b/furniture-3d-system/src/server/services/download-center/download-center.service.ts
index 32fb8bc1..276ced5a 100644
--- a/furniture-3d-system/src/server/services/download-center/download-center.service.ts
+++ b/furniture-3d-system/src/server/services/download-center/download-center.service.ts
@@ -114,6 +114,12 @@ async function runTask(taskId: string) {
       params = {}
     }
     const result = await executor.run({ taskId: task.id, taskDir, params })
+    // 任务在生成期间被删除/取消：丢弃产物，不再产出可下载文件
+    const latest = await downloadTaskRepository.findById(taskId).catch(() => null)
+    if (!latest || latest.status !== 'processing') {
+      removeTaskDir(taskId)
+      return
+    }
     const filePath = path.join(taskDir, path.basename(result.fileName))
     const fileSize = fs.existsSync(filePath) ? fs.statSync(filePath).size : 0
     await downloadTaskRepository.update(task.id, {
@@ -126,6 +132,10 @@ async function runTask(taskId: string) {
       finishedAt: now(),
     })
   } catch (error) {
+    // 任务可能已在生成期间被删除：目录清掉、静默结束
+    removeTaskDir(taskId)
+    const latest = await downloadTaskRepository.findById(taskId).catch(() => null)
+    if (!latest || latest.status !== 'processing') return
     const message = error instanceof Error ? error.message : String(error)
     console.error(`[download-center] 任务 ${taskId} 失败:`, message)
     await downloadTaskRepository.update(task.id, {