diff --git a/packages/uni-migration/lib/index.js b/packages/uni-migration/lib/index.js
index 0189efc0cd32c3150174507b3b2d79ea5e8f305e..06183ec3452a2d70090444c095805a32bdd98294 100644
--- a/packages/uni-migration/lib/index.js
+++ b/packages/uni-migration/lib/index.js
@@ -39,7 +39,7 @@ module.exports = function migrate(input, out, options = {}) {
         )
       ) {
         options.silent !== true && console.log(`copy: ${dest}`)
-        fs.copySync(src, dest)
+        src !== dest && fs.copySync(src, dest)
       }
     } else {
       options.silent !== true && console.log(`write: ${path.resolve(out, asset.path)}`)