<input id="input" name="input" ng-model="querykdUser.page.pageSize" ng-keyup="myKeyup($event)" class="form-control" style="width:60px;"> 

$scope.myKeyup = function(e){

 //IE 编码包含在window.event.keyCode中，Firefox或Safari 包含在event.which中
var keycode = window.event?e.keyCode:e.which; 
    if(keycode==13){
    $scope.showkdUsers();
    }
};