diff --git a/packages/theme-saas/src/autocomplete/index.less b/packages/theme-saas/src/autocomplete/index.less
index 6285fce8e3..92c1262177 100644
--- a/packages/theme-saas/src/autocomplete/index.less
+++ b/packages/theme-saas/src/autocomplete/index.less
@@ -8,6 +8,7 @@
 .@{autocomplete-prefix-cls} {
   @apply relative;
   @apply inline-block;
+  @apply w-full;
 
   &.show-auto-width {
     @apply w-full;
@@ -30,7 +31,8 @@
     }
 
     // 兼容ie10-ie11
-    @media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
+    @media screen and (-ms-high-contrast: active),
+    (-ms-high-contrast: none) {
       &__wrap {
         margin-bottom: -17px !important;
         @apply ~'pb-1.5';
@@ -69,6 +71,7 @@
       }
 
       &:only-of-type {
+
         &,
         &:hover {
           @apply bg-color-bg-3;
@@ -108,4 +111,4 @@
       @apply ~'mt-0.5';
     }
   }
-}
+}
\ No newline at end of file
diff --git a/packages/theme/src/autocomplete/index.less b/packages/theme/src/autocomplete/index.less
index 9c2abfbbdd..ff617bbfcd 100644
--- a/packages/theme/src/autocomplete/index.less
+++ b/packages/theme/src/autocomplete/index.less
@@ -18,6 +18,7 @@
 .@{autocomplete-prefix-cls} {
   position: relative;
   display: inline-block;
+  width: 100%;
 
   &.show-auto-width {
     width: 100%;
@@ -75,4 +76,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file