diff --git a/types/affix.d.ts b/types/affix.d.ts
index a255abbf2dc..f9a2af20f60 100644
--- a/types/affix.d.ts
+++ b/types/affix.d.ts
@@ -4,5 +4,5 @@ import { ElementUIComponent } from './component'
 export declare class ElAffix extends ElementUIComponent {
   offsetBottom?: number
   offsetTop?: number
-  target?: function
+  target?: () => HTMLElement
 }
diff --git a/types/data-mapper.d.ts b/types/data-mapper.d.ts
index 638aefc26a4..c761938ebd4 100644
--- a/types/data-mapper.d.ts
+++ b/types/data-mapper.d.ts
@@ -9,7 +9,7 @@ export declare class ElDataMapper extends ElementUIComponent {
   columns:object[]
 
   /** formatter col*/
-  formatter:function (data,col,index) 
+  formatter: <T>(data: object,col: object,index: number) => T
 
   /** The placeholder of data-mapper content */
   placeholder:string
diff --git a/types/element-ui.d.ts b/types/element-ui.d.ts
index 5c6e71999d9..72440cf2bb3 100644
--- a/types/element-ui.d.ts
+++ b/types/element-ui.d.ts
@@ -135,6 +135,9 @@ export const Message: ElMessage
 /** A set of modal boxes simulating system message box, mainly for message prompt, success tips, error messages and query information */
 export const MessageBox: ElMessageBox
 
+/** A set of modal boxes simulating system message box center, mainly for message prompt, success tips, error messages and query information */
+export const MessageBoxCenter: ElMessageBoxCenter
+
 /** Displays a global notification message at the upper right corner of the page */
 export const Notification: ElNotification
 
@@ -371,9 +374,6 @@ export class LrContainer extends ElLrContainer {}
 /** LoadingButton Component */
 export class LoadingButton extends ElLoadingButton {}
 
-/** MessageBoxCenter Component */
-export class MessageBoxCenter extends ElMessageBoxCenter {}
-
 /** TabsDotted Component */
 export class TabsDotted extends ElTabsDotted {}
 
diff --git a/types/loading-button.d.ts b/types/loading-button.d.ts
index 39d63db8dc5..9665ad537aa 100644
--- a/types/loading-button.d.ts
+++ b/types/loading-button.d.ts
@@ -2,5 +2,5 @@ import { ElButton } from './button'
 
 /** LoadingButton Component */
 export declare class ElLoadingButton extends ElButton {
-  loadingClick: function(): Promise<any>
+  loadingClick: () => Promise<any>
 }
diff --git a/types/panel.d.ts b/types/panel.d.ts
index 5650f416c52..499d3d0f081 100644
--- a/types/panel.d.ts
+++ b/types/panel.d.ts
@@ -14,7 +14,7 @@ export declare class ElPanel extends ElementUIComponent {
 
   /** bodyPadding */
   bodyPadding: string
-|     
+  
   /** Panel width */
   width: string | number
 }