diff --git a/dist/form/index.wxss b/dist/form/index.wxss
index 4fbb2879..09f2692a 100644
--- a/dist/form/index.wxss
+++ b/dist/form/index.wxss
@@ -33,4 +33,5 @@
 
 .zui-form__textarea textarea {
   width: auto;
+  flex: 1;
 }