diff --git a/packages/components/menu/src/menu.ts b/packages/components/menu/src/menu.ts
index ba8940f683..70956b3ddc 100644
--- a/packages/components/menu/src/menu.ts
+++ b/packages/components/menu/src/menu.ts
@@ -140,7 +140,7 @@ export const menuProps = buildProps({
    * @description Tooltip theme, built-in theme: `dark` / `light` when menu is collapsed
    */
   popperEffect: {
-    type: definePropType<PopperEffect | string>(String),
+    type: definePropType<PopperEffect>(String),
     default: 'dark',
   },
   /**
diff --git a/packages/components/popper/src/content.ts b/packages/components/popper/src/content.ts
index a9664e7348..b7642d4b7a 100644
--- a/packages/components/popper/src/content.ts
+++ b/packages/components/popper/src/content.ts
@@ -74,7 +74,7 @@ export const popperContentProps = buildProps({
     type: definePropType<ClassType>([String, Array, Object]),
   },
   effect: {
-    type: definePropType<PopperEffect | string>(String),
+    type: definePropType<PopperEffect>(String),
     default: 'dark',
   },
   visible: Boolean,
diff --git a/packages/components/popper/src/popper.ts b/packages/components/popper/src/popper.ts
index 27560b164c..2598b2f3fa 100644
--- a/packages/components/popper/src/popper.ts
+++ b/packages/components/popper/src/popper.ts
@@ -24,7 +24,9 @@ export const roleTypes = [
   'tree',
 ] as const
 
-export type PopperEffect = typeof effects[number]
+export type PopperEffect =
+  | typeof effects[number]
+  | (string & NonNullable<unknown>)
 export type PopperTrigger = typeof triggers[number]
 
 export const popperProps = buildProps({
diff --git a/packages/components/select-v2/src/defaults.ts b/packages/components/select-v2/src/defaults.ts
index a14705e95c..4ae9cb901e 100644
--- a/packages/components/select-v2/src/defaults.ts
+++ b/packages/components/select-v2/src/defaults.ts
@@ -57,7 +57,7 @@ export const SelectProps = buildProps({
    * @description tooltip theme, built-in theme: `dark` / `light`
    */
   effect: {
-    type: definePropType<PopperEffect | string>(String),
+    type: definePropType<PopperEffect>(String),
     default: 'light',
   },
   /**
diff --git a/packages/components/select/src/select.ts b/packages/components/select/src/select.ts
index ada324cb43..4e7393db23 100644
--- a/packages/components/select/src/select.ts
+++ b/packages/components/select/src/select.ts
@@ -49,7 +49,7 @@ export const SelectProps = buildProps({
    * @description tooltip theme, built-in theme: `dark` / `light`
    */
   effect: {
-    type: definePropType<PopperEffect | string>(String),
+    type: definePropType<PopperEffect>(String),
     default: 'light',
   },
   /**
diff --git a/packages/components/time-select/src/time-select.ts b/packages/components/time-select/src/time-select.ts
index 408d56f1b1..ec6fb4b3c6 100644
--- a/packages/components/time-select/src/time-select.ts
+++ b/packages/components/time-select/src/time-select.ts
@@ -32,7 +32,7 @@ export const timeSelectProps = buildProps({
    * @description Tooltip theme, built-in theme: `dark` / `light`
    */
   effect: {
-    type: definePropType<PopperEffect | string>(String),
+    type: definePropType<PopperEffect>(String),
     default: 'light',
   },
   /**
diff --git a/packages/components/tooltip-v2/src/content.ts b/packages/components/tooltip-v2/src/content.ts
index 2b55647ffa..3a92f74e7d 100644
--- a/packages/components/tooltip-v2/src/content.ts
+++ b/packages/components/tooltip-v2/src/content.ts
@@ -28,7 +28,7 @@ export const tooltipV2ContentProps = buildProps({
     default: 5,
   },
   effect: {
-    type: definePropType<PopperEffect | string>(String),
+    type: definePropType<PopperEffect>(String),
     default: 'light',
   },
   contentClass: String,