diff --git a/src/input/style/InputButton.less b/src/input/style/InputButton.less
index fd923934fb..f6b5b462d0 100644
--- a/src/input/style/InputButton.less
+++ b/src/input/style/InputButton.less
@@ -4,6 +4,7 @@
 
 .@{input-prefix-cls}.@{input-btn-prefix-cls} {
   input {
+    width: calc(100% - 22px);
     overflow: hidden;
     white-space: nowrap;
     text-overflow: ellipsis;