diff --git a/work/externalcontact/callback.go b/work/externalcontact/callback.go
new file mode 100644
index 0000000..f570340
--- /dev/null
+++ b/work/externalcontact/callback.go
@@ -0,0 +1,45 @@
+package externalcontact
+
+import (
+	"encoding/xml"
+
+	"github.com/silenceper/wechat/v2/util"
+)
+
+// 原始回调消息内容
+type callbackOriginMessage struct {
+	ToUserName string // 企业微信的CorpID，当为第三方套件回调事件时，CorpID的内容为suiteid
+	AgentID    string // 接收的应用id，可在应用的设置页面获取
+	Encrypt    string // 消息结构体加密后的字符串
+}
+
+// EventCallbackMessage 微信客户联系回调消息
+// https://developer.work.weixin.qq.com/document/path/92130
+type EventCallbackMessage struct {
+	ToUserName     string `json:"to_user_name"`
+	FromUserName   string `json:"from_user_name"`
+	CreateTime     int64  `json:"create_time"`
+	MsgType        string `json:"msg_type"`
+	Event          string `json:"event"`
+	ChangeType     string `json:"change_type"`
+	UserID         string `json:"user_id"`
+	ExternalUserID string `json:"external_user_id"`
+	State          string `json:"state"`
+	WelcomeCode    string `json:"welcome_code"`
+}
+
+// GetCallbackMessage 获取联系客户回调事件中的消息内容
+func (r *Client) GetCallbackMessage(encryptedMsg []byte) (msg EventCallbackMessage, err error) {
+	var origin callbackOriginMessage
+	if err = xml.Unmarshal(encryptedMsg, &origin); err != nil {
+		return
+	}
+	_, bData, err := util.DecryptMsg(r.CorpID, origin.Encrypt, r.EncodingAESKey)
+	if err != nil {
+		return
+	}
+	if err = xml.Unmarshal(bData, &msg); err != nil {
+		return
+	}
+	return
+}