var data = [
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" },
      { name: "明天", age: "25" }
    ];
    var result = [];
    for (var i = 0; i < data.length; i += 3) {
      result.push(data.slice(i, i + 3));
    }
    console.log(result);