diff --git a/cmd/answer/wire_gen.go b/cmd/answer/wire_gen.go
index fe01c2db..515efa46 100644
--- a/cmd/answer/wire_gen.go
+++ b/cmd/answer/wire_gen.go
@@ -181,7 +181,7 @@ func initApplication(debug bool, serverConf *conf.Server, dbConf *data.Database,
 	reportAdminService := report_admin.NewReportAdminService(reportRepo, userCommon, commonRepo, answerRepo, questionRepo, commentCommonRepo, reportHandle, configRepo)
 	controller_adminReportController := controller_admin.NewReportController(reportAdminService)
 	userAdminRepo := user.NewUserAdminRepo(dataData, authRepo)
-	userAdminService := user_admin.NewUserAdminService(userAdminRepo, userRoleRelService, authService, userCommon)
+	userAdminService := user_admin.NewUserAdminService(userAdminRepo, userRoleRelService, authService, userCommon, userActiveActivityRepo)
 	userAdminController := controller_admin.NewUserAdminController(userAdminService)
 	reasonRepo := reason.NewReasonRepo(configRepo)
 	reasonService := reason2.NewReasonService(reasonRepo)
diff --git a/internal/service/user_admin/user_backyard.go b/internal/service/user_admin/user_backyard.go
index 9641bdfe..ae09ce85 100644
--- a/internal/service/user_admin/user_backyard.go
+++ b/internal/service/user_admin/user_backyard.go
@@ -12,6 +12,7 @@ import (
 	"github.com/answerdev/answer/internal/base/reason"
 	"github.com/answerdev/answer/internal/entity"
 	"github.com/answerdev/answer/internal/schema"
+	"github.com/answerdev/answer/internal/service/activity"
 	"github.com/answerdev/answer/internal/service/auth"
 	"github.com/answerdev/answer/internal/service/role"
 	usercommon "github.com/answerdev/answer/internal/service/user_common"
@@ -38,6 +39,7 @@ type UserAdminService struct {
 	userRoleRelService *role.UserRoleRelService
 	authService        *auth.AuthService
 	userCommonService  *usercommon.UserCommon
+	userActivity       activity.UserActiveActivityRepo
 }
 
 // NewUserAdminService new user admin service
@@ -46,12 +48,14 @@ func NewUserAdminService(
 	userRoleRelService *role.UserRoleRelService,
 	authService *auth.AuthService,
 	userCommonService *usercommon.UserCommon,
+	userActivity activity.UserActiveActivityRepo,
 ) *UserAdminService {
 	return &UserAdminService{
 		userRepo:           userRepo,
 		userRoleRelService: userRoleRelService,
 		authService:        authService,
 		userCommonService:  userCommonService,
+		userActivity:       userActivity,
 	}
 }
 
@@ -83,7 +87,17 @@ func (us *UserAdminService) UpdateUserStatus(ctx context.Context, req *schema.Up
 		userInfo.Status = entity.UserStatusAvailable
 		userInfo.MailStatus = entity.EmailStatusAvailable
 	}
-	return us.userRepo.UpdateUserStatus(ctx, userInfo.ID, userInfo.Status, userInfo.MailStatus, userInfo.EMail)
+
+	err = us.userRepo.UpdateUserStatus(ctx, userInfo.ID, userInfo.Status, userInfo.MailStatus, userInfo.EMail)
+	if err != nil {
+		return err
+	}
+
+	// if user reputation is zero means this user is inactive, so try to activate this user.
+	if req.IsNormal() && userInfo.Rank == 0 {
+		return us.userActivity.UserActive(ctx, userInfo.ID)
+	}
+	return nil
 }
 
 // UpdateUserRole update user role