diff --git a/controllers/auth.go b/controllers/auth.go
index f55e669b..5784c0d9 100644
--- a/controllers/auth.go
+++ b/controllers/auth.go
@@ -417,8 +417,15 @@ func (c *ApiController) Login() {
 			} else if provider.Category == "OAuth" {
 				// Sign up via OAuth
 				if application.EnableLinkWithEmail {
-					// find user that has the same email
-					user = object.GetUserByField(application.Organization, "email", userInfo.Email)
+					if userInfo.Email != "" {
+						// Find existing user with Email
+						user = object.GetUserByField(application.Organization, "email", userInfo.Email)
+					}
+
+					if user == nil && userInfo.Phone != "" {
+						// Find existing user with phone number
+						user = object.GetUserByField(application.Organization, "phone", userInfo.Phone)
+					}
 				}
 
 				if user == nil || user.IsDeleted {
diff --git a/idp/dingtalk.go b/idp/dingtalk.go
index 58555aaf..b890a638 100644
--- a/idp/dingtalk.go
+++ b/idp/dingtalk.go
@@ -179,8 +179,12 @@ func (idp *DingTalkIdProvider) GetUserInfo(token *oauth2.Token) (*UserInfo, erro
 		return nil, err
 	}
 
-	corpEmail, jobNumber, err := idp.getUserCorpEmail(userId, corpAccessToken)
+	corpMobile, corpEmail, jobNumber, err := idp.getUserCorpEmail(userId, corpAccessToken)
 	if err == nil {
+		if corpMobile != "" {
+			userInfo.Phone = corpMobile
+		}
+
 		if corpEmail != "" {
 			userInfo.Email = corpEmail
 		}
@@ -264,27 +268,29 @@ func (idp *DingTalkIdProvider) getUserId(unionId string, accessToken string) (st
 	return data.Result.UserId, nil
 }
 
-func (idp *DingTalkIdProvider) getUserCorpEmail(userId string, accessToken string) (string, string, error) {
+func (idp *DingTalkIdProvider) getUserCorpEmail(userId string, accessToken string) (string, string, string, error) {
+	// https://open.dingtalk.com/document/isvapp/query-user-details
 	body := make(map[string]string)
 	body["userid"] = userId
 	respBytes, err := idp.postWithBody(body, "https://oapi.dingtalk.com/topapi/v2/user/get?access_token="+accessToken)
 	if err != nil {
-		return "", "", err
+		return "", "", "", err
 	}
 
 	var data struct {
 		ErrMessage string `json:"errmsg"`
 		Result     struct {
+			Mobile    string `json:"mobile"`
 			Email     string `json:"email"`
 			JobNumber string `json:"job_number"`
 		} `json:"result"`
 	}
 	err = json.Unmarshal(respBytes, &data)
 	if err != nil {
-		return "", "", err
+		return "", "", "", err
 	}
 	if data.ErrMessage != "ok" {
-		return "", "", fmt.Errorf(data.ErrMessage)
+		return "", "", "", fmt.Errorf(data.ErrMessage)
 	}
-	return data.Result.Email, data.Result.JobNumber, nil
+	return data.Result.Mobile, data.Result.Email, data.Result.JobNumber, nil
 }