diff --git a/appmessagetype_string.go b/appmessagetype_string.go
new file mode 100644
index 0000000..9883419
--- /dev/null
+++ b/appmessagetype_string.go
@@ -0,0 +1,62 @@
+// Code generated by "stringer -type=AppMessageType -linecomment=true"; DO NOT EDIT.
+
+package openwechat
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[AppMsgTypeText-1]
+	_ = x[AppMsgTypeImg-2]
+	_ = x[AppMsgTypeAudio-3]
+	_ = x[AppMsgTypeVideo-4]
+	_ = x[AppMsgTypeUrl-5]
+	_ = x[AppMsgTypeAttach-6]
+	_ = x[AppMsgTypeOpen-7]
+	_ = x[AppMsgTypeEmoji-8]
+	_ = x[AppMsgTypeVoiceRemind-9]
+	_ = x[AppMsgTypeScanGood-10]
+	_ = x[AppMsgTypeGood-13]
+	_ = x[AppMsgTypeEmotion-15]
+	_ = x[AppMsgTypeCardTicket-16]
+	_ = x[AppMsgTypeRealtimeShareLocation-17]
+	_ = x[AppMsgTypeTransfers-2000]
+	_ = x[AppMsgTypeRedEnvelopes-2001]
+	_ = x[AppMsgTypeReaderType-100001]
+}
+
+const (
+	_AppMessageType_name_0 = "文本消息图片消息语音消息视频消息文章消息附件消息Open表情消息VoiceRemindScanGood"
+	_AppMessageType_name_1 = "Good"
+	_AppMessageType_name_2 = "Emotion名片消息地理位置消息"
+	_AppMessageType_name_3 = "转账消息红包消息"
+	_AppMessageType_name_4 = "自定义的消息"
+)
+
+var (
+	_AppMessageType_index_0 = [...]uint8{0, 12, 24, 36, 48, 60, 72, 76, 88, 99, 107}
+	_AppMessageType_index_2 = [...]uint8{0, 7, 19, 37}
+	_AppMessageType_index_3 = [...]uint8{0, 12, 24}
+)
+
+func (i AppMessageType) String() string {
+	switch {
+	case 1 <= i && i <= 10:
+		i -= 1
+		return _AppMessageType_name_0[_AppMessageType_index_0[i]:_AppMessageType_index_0[i+1]]
+	case i == 13:
+		return _AppMessageType_name_1
+	case 15 <= i && i <= 17:
+		i -= 15
+		return _AppMessageType_name_2[_AppMessageType_index_2[i]:_AppMessageType_index_2[i+1]]
+	case 2000 <= i && i <= 2001:
+		i -= 2000
+		return _AppMessageType_name_3[_AppMessageType_index_3[i]:_AppMessageType_index_3[i+1]]
+	case i == 100001:
+		return _AppMessageType_name_4
+	default:
+		return "AppMessageType(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+}
diff --git a/global.go b/global.go
index 7e9745e..5e5cfb1 100644
--- a/global.go
+++ b/global.go
@@ -44,7 +44,11 @@ const (
 // 详见 message_test.go
 type MessageType int
 
+// AppMessageType以Go惯用形式定义了PC微信所有的官方App消息类型。
+type AppMessageType int
+
 //go:generate stringer -type=MessageType -linecomment=true
+//go:generate stringer -type=AppMessageType -linecomment=true
 
 // https://res.wx.qq.com/a/wx_fed/webwx/res/static/js/index_c7d281c.js
 // MSGTYPE_TEXT
@@ -63,8 +67,6 @@ type MessageType int
 // MSGTYPE_MICROVIDEO
 // MSGTYPE_SYS
 // MSGTYPE_RECALLED
-// varcaser.Caser{
-//		From: varcaser.ScreamingSnakeCase, To: varcaser.UpperCamelCaseKeepCaps}
 
 const (
 	MsgTypeText           MessageType = 1     // 文本消息
@@ -85,6 +87,27 @@ const (
 	MsgTypeRecalled       MessageType = 10002 // 消息撤回
 )
 
+const (
+	AppMsgTypeText                  AppMessageType = 1      // 文本消息
+	AppMsgTypeImg                   AppMessageType = 2      // 图片消息
+	AppMsgTypeAudio                 AppMessageType = 3      // 语音消息
+	AppMsgTypeVideo                 AppMessageType = 4      // 视频消息
+	AppMsgTypeUrl                   AppMessageType = 5      // 文章消息
+	AppMsgTypeAttach                AppMessageType = 6      // 附件消息
+	AppMsgTypeOpen                  AppMessageType = 7      // Open
+	AppMsgTypeEmoji                 AppMessageType = 8      // 表情消息
+	AppMsgTypeVoiceRemind           AppMessageType = 9      // VoiceRemind
+	AppMsgTypeScanGood              AppMessageType = 10     // ScanGood
+	AppMsgTypeGood                  AppMessageType = 13     // Good
+	AppMsgTypeEmotion               AppMessageType = 15     // Emotion
+	AppMsgTypeCardTicket            AppMessageType = 16     // 名片消息
+	AppMsgTypeRealtimeShareLocation AppMessageType = 17     // 地理位置消息
+	AppMsgTypeTransfers             AppMessageType = 2000   // 转账消息
+	AppMsgTypeRedEnvelopes          AppMessageType = 2001   // 红包消息
+	AppMsgTypeReaderType            AppMessageType = 100001 //自定义的消息
+
+)
+
 // 登录状态
 const (
 	StatusSuccess = "200"