diff --git a/src/case/combo/searchtextvaluecombo/combo.searchtextvalue.js b/src/case/combo/searchtextvaluecombo/combo.searchtextvalue.js
index 95deeb26c..0d497d531 100644
--- a/src/case/combo/searchtextvaluecombo/combo.searchtextvalue.js
+++ b/src/case/combo/searchtextvaluecombo/combo.searchtextvalue.js
@@ -9,7 +9,6 @@ BI.SearchTextValueCombo = BI.inherit(BI.Widget, {
         text: "",
         items: [],
         tipType: "",
-        extraCls: "",
         warningTitle: "",
         attributes: {
             tabIndex: 0
@@ -31,7 +30,7 @@ BI.SearchTextValueCombo = BI.inherit(BI.Widget, {
                     },
                     el: {
                         type: "bi.search_text_value_trigger",
-                        cls: "search-text-value-trigger " + this.options.extraCls,
+                        cls: "search-text-value-trigger",
                         ref: function () {
                             self.trigger = this;
                         },
diff --git a/src/less/base/combo/combo.searchtextvalue.less b/src/less/base/combo/combo.searchtextvalue.less
index b8f408068..fecca71ff 100644
--- a/src/less/base/combo/combo.searchtextvalue.less
+++ b/src/less/base/combo/combo.searchtextvalue.less
@@ -4,6 +4,9 @@
   & .trigger-icon-button{
     font-size: 16px;
   }
+  & .search-text-value-trigger{
+    .border-radius(2px);
+  }
   &.combo-error {
     & .bi-search-text-value-trigger{
       & .bi-text-button {
@@ -17,4 +20,4 @@
       .rotate(180deg);
     }
   }
-}
\ No newline at end of file
+}