diff --git a/src/event-bus.js b/src/event-bus.js
index 1140686..acfb47f 100644
--- a/src/event-bus.js
+++ b/src/event-bus.js
@@ -48,7 +48,12 @@ class CQEventBus {
           approve: [],
           invite: []
         },
-        friend_add: []
+        friend_add: [],
+        group_ban: {
+          '': [],
+          ban: [],
+          lift_ban: []
+        }
       },
       request: {
         '': [],
diff --git a/src/index.js b/src/index.js
index a9646e7..04a4e0e 100644
--- a/src/index.js
+++ b/src/index.js
@@ -301,6 +301,21 @@ class CQWebSocket extends $Callable {
           case 'friend_add':
             this._eventBus.emit('notice.friend_add', msgObj)
             break
+          case 'group_ban':
+            switch (msgObj.sub_type) {
+              case 'ban':
+                this._eventBus.emit('notice.group_ban.ban', msgObj)
+                break
+              case 'lift_ban':
+                this._eventBus.emit('notice.group_ban.lift_ban', msgObj)
+                break
+              default:
+                this._eventBus.emit('error', new UnexpectedContextError(
+                  msgObj,
+                  'unexpected "sub_type"'
+                ))
+            }
+            break
           default:
             this._eventBus.emit('error', new UnexpectedContextError(
               msgObj,