diff --git a/packages/taro-loader/src/entry-cache.ts b/packages/taro-loader/src/entry-cache.ts
index bdb52b783c81..4d12464b5f11 100644
--- a/packages/taro-loader/src/entry-cache.ts
+++ b/packages/taro-loader/src/entry-cache.ts
@@ -8,5 +8,8 @@ export default function () {
     // just in case, delete cache in next tick
     setImmediate(() => entryCache.delete(name))
     callback(null, content!.source, content!.map)
+  } else {
+    // 当 webpack 持久化缓存命中时，entryCache 为空，需要兜底返回空字符串
+    callback(null, '')
   }
 }