var option = {
  color: ["#00C088", "#67c23a", "#0490f2","#d03559", "#ff7600"],
  tooltip: {
    trigger: 'item',
    formatter: "{a} 
{b}: {c} ({d}%)"
  },
  series: [{
    name: '学校年龄占比',
    type: 'pie',
    radius: ['35%', '50%'],
    avoidLabelOverlap: false,
    // roseType: 'area',
    hoverAnimation:true,
    startAngle: 60,
    minAngle: 30,
    label: {
      normal: {
        formatter: '{b|{b}}{per|{d}%}  ', //label 的内容
        borderWidth: 10,
        rich: { //定义不同地方的文字的字体大小和颜色
          b: {
            fontSize: 12,
            lineHeight: 33,
            color: '#7f8087',
          },
          per: {
            color: '#7f8087',
            padding: [2, 4],
            fontSize: 12
          }
        }
      }
    },
    data: [
    {
        "name": "小于9岁",
        "value": 165
    },
	{
        "name": "9-12岁",
        "value": 6491
    },
    {
        "name": "12-14岁",
        "value": 3699
    },
    {
        "name": "大于14岁",
        "value": 934
    }]
  }]
};
var myChart = echarts.init(document.getElementById('main'));
myChart.setOption(option);

点击运行 》