如果后端给你的是字符串，需要你自己转换成JSON格式。如下：

var data = "{
    "data":[{
        "id":14,"linkman":"北大荒2",
        "link_phone":"13889564578",
        "area_code":"110103007",
        "address":"永定门外街道永定门外222222",
        "status":0,
        "remarks":null,
        "creater_id":9,
        "is_default":"0",
        "creater_time":null,
        "update_time":1489374667000
    },{
        "id":2,
        "linkman":"联系人2",
        "link_phone":"1388978895",
        "area_code":"110101001",
        "address":"东华门街道",
        "status":0,
        "remark请输入代码s":"re",
        "creater_id":9,
        "is_default":"0",
        "creater_time":null,
        "update_time":1489373211000
    },{
        "id":1,
        "linkman":"北大荒2",
        "link_phone":"13889564578",
        "area_code":"110103007",
        "address":"永定门外街道永定门外222222",
        "status":0,
        "remarks":"re",
        "creater_id":9,
        "is_default":"1",
        "creater_time":null,
        "update_time":1489386290000
    }],
    "msg":"查询成功",
    "code":200
    }";

data = JSON.parse(data);

这样data就是一个JSON对象了，你可以用对象和数组的方式取你想要的变量的值

var link_phone=j.data[0].link_phone;
var linkman=j.data[0].linkman;
var address=j.data[0].address;
然后ajax

先将代码放到 http://www.bejson.com/ 校验一下 （没什么，就是为了更好看~）
假设返回来的这段json称为“response”

// jquery代码如下：
$.ajax({
    type:"post",
    url:"你获取这段json的地址",
    success: function(response){
        for(var i = 0; i < response.data.length; i++){
            //获取link_phone linkman address
            response.data[i].link_phone;
            response.data[i].linkman;
            response.data[i].address;
        }
        
    }
    
});