实现同一组legend控制两个饼图示例：

该示例有如下几个特点：

        ①饼图不同值实现分割

        ②实现tooltip自定义样式（echarts 实现tooltip提示框样式自定义-CSDN博客）

        ③自定义label内容

        ④不同值颜色渐变

代码如下：

this.options = {
  title: [
    {
      text: '保管专业',
      x: "center",
      y: "center",
      left: "49%",
      top: "23%",
      textAlign: "center",
      textStyle: {
        color: "#ffffffcc",
        fontSize: 16,
        fontWeight: "bold",
        align: "center",
      },
    },
    {
      text: '救生专业',
      x: "center",
      y: "center",
      left: "49%",
      top: "73%",
      textAlign: "center",
      textStyle: {
        color: "#ffffffcc",
        fontSize: 16,
        fontWeight: "bold",
        align: "center",
      },
    },
  ],
  tooltip: {
    trigger: 'item',
    textStyle: {
      align: "left",
    },
    className: 'custom-tooltip-box',
    formatter: function(params) {
      return `<div class='custom-tooltip-style'>
        <span>${airportName} ${params.seriesName}</span></br>
        <div class="span">
          <span>${params.name}</span>
          <span>${params.value} 人</span>
        </div>
      </div>`
    },
  },
  legend: {
    orient: "vertical",
    // top: "40%",
    left: "2%",
    top:"2%",
    align: "left",
    textStyle: {
      color: "#C7F1FF",
      fontSize: 16
    },
    itemWidth: 15,
    itemHeight: 15,
    data: ["军官", "军士", "义务兵"]
  },
  color: this.colors,
  series: [
    {
      name: '保管专业',
      type: 'pie',
      radius: ['18%', '30%'],
      center: ['50%', '25%'],
      avoidLabelOverlap: false,
      labelLine: {
        normal: {
          length: 20,
          length2: 120,
          lineStyle: {
            width: 1,
          },
        },
      },
      label: {
        show: true,
        position: "outside",
        padding: [0, -70, 25, -100],
        edgeDistance: 5,
        textStyle: {
          color: "#ffffff",
          fontSize: 16,
        },
        formatter: (params) => {
          return params.name + " " + "{percent|" + params.percent.toFixed(0) + "%}";
        },
        rich: {
          hr: {
            borderRadius: 3,
            width: 3,
            height: 3,
          },
          a: {},
        },
      },
      itemStyle: {
        borderWidth: 8,
        borderColor: "#113a75"
      },
      data: this.echartData1
    },
    {
      name: '救生专业',
      type: 'pie',
      radius: ['18%', '30%'],
      center: ['50%', '75%'],
      avoidLabelOverlap: false,
      labelLine: {
        normal: {
          length: 20,
          length2: 120,
          lineStyle: {
            width: 1,
          },
        },
      },
      label: {
        show: true,
        position: "outside",
        padding: [0, -70, 25, -100],
        edgeDistance: 5,
        textStyle: {
          color: "#ffffff",
          fontSize: 16,
        },
        formatter: (params) => {
          return params.name + " " + "{percent|" + params.percent.toFixed(0) + "%}";
        },
        rich: {
          hr: {
            borderRadius: 3,
            width: 3,
            height: 3,
          },
          a: {},
        },
      },
      itemStyle: {
        borderWidth: 8,
        borderColor: "#113a75"
      },
      data: this.echartData2
    }
  ]
}

效果图如下：

该示例中的属性可在官网中查阅，若有其他疑问可私信留言互相交流学习~