diff --git a/packages/taro-mini-runner/src/plugins/MiniPlugin.ts b/packages/taro-mini-runner/src/plugins/MiniPlugin.ts
index d58c16f9a834..f0bf69f69055 100644
--- a/packages/taro-mini-runner/src/plugins/MiniPlugin.ts
+++ b/packages/taro-mini-runner/src/plugins/MiniPlugin.ts
@@ -772,7 +772,7 @@ export default class MiniPlugin {
           pageConfigs: this.pageConfigs,
           quickappJSON: this.options.quickappJSON
         })
-        const quickappJSONStr = JSON.stringify(quickappJSON)
+        const quickappJSONStr = JSON.stringify(quickappJSON).replace(/\\\\/g, '/')
         compilation.assets['./manifest.json'] = {
           size: () => quickappJSONStr.length,
           source: () => quickappJSONStr