diff --git a/devui/button/src/button.tsx b/devui/button/src/button.tsx
index 07c748126786f1f83538454ab9d201efcc37f760..aaab4595c698faa000922071547d60225f395706 100644
--- a/devui/button/src/button.tsx
+++ b/devui/button/src/button.tsx
@@ -44,7 +44,7 @@ export default defineComponent({
     },
     width: {
       type: Number,
-      default: 0
+      default: null
     },
     disabled: {
       type: Boolean,