diff --git a/client/packages/lowcoder/src/comps/comps/selectInputComp/selectInputConstants.tsx b/client/packages/lowcoder/src/comps/comps/selectInputComp/selectInputConstants.tsx
index 290f3628d..d7b5648e1 100644
--- a/client/packages/lowcoder/src/comps/comps/selectInputComp/selectInputConstants.tsx
+++ b/client/packages/lowcoder/src/comps/comps/selectInputComp/selectInputConstants.tsx
@@ -128,7 +128,8 @@ export const SelectInputValidationSection = (children: ValidationComp) => (
       label: trans("prop.showEmptyValidation"),
     })}
     {children.allowCustomTags.propertyView({
-      label: trans("prop.customTags") 
+      label: trans("prop.customTags"),
+      tooltip: trans("prop.customTagsTooltip")
     })}
     {children.customRule.propertyView({})}
   </Section>
diff --git a/client/packages/lowcoder/src/i18n/locales/en.ts b/client/packages/lowcoder/src/i18n/locales/en.ts
index 43bcb3986..f644df665 100644
--- a/client/packages/lowcoder/src/i18n/locales/en.ts
+++ b/client/packages/lowcoder/src/i18n/locales/en.ts
@@ -235,7 +235,8 @@ export const en = {
     "verticalGridCells": "Vertical Grid Cells",
     "timeZone": "TimeZone",
     "pickerMode": "Picker Mode",
-    "customTags": "Custom Tags"
+    "customTags": "Allow Custom Tags",
+    "customTagsTooltip": "Allow users to enter custom tags that are not in the options list."
   },
   "autoHeightProp": {
     "auto": "Auto",