diff --git a/src/case/trigger/trigger.text.select.js b/src/case/trigger/trigger.text.select.js
index 6871a8740..4ec177764 100644
--- a/src/case/trigger/trigger.text.select.js
+++ b/src/case/trigger/trigger.text.select.js
@@ -12,6 +12,7 @@ BI.SelectTextTrigger = BI.inherit(BI.Trigger, {
             baseCls: "bi-select-text-trigger",
             height: 24,
             allowClear: false,
+            valueFormatter: BI.emptyFn,
         });
     },