使用line，宽度增大到所需要的宽度，设置下颜色+透明度就行

tooltip: {trigger: 'axis',//把阴影的层级往下降z:-15,axisPointer: {type: 'line',lineStyle: {color: 'rgba(150,150,150,0.3)',width: 44,type: 'solid',},},
},
series: [{type: 'bar',barWidth:20,//柱状宽度barGap:'20%',//坐标轴占比itemStyle: {//柱状图渐变color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{ offset: 0, color: '#f5b78c' },{ offset: 0.3, color: '#a3948b' },{ offset: 0.5, color: '#838485' },{ offset: 0.8, color: '#395064' },{ offset: 1, color: '#273d4f' }])},emphasis: { label: { show: true ,position:'top',color:'pink'} },//鼠标放上显示柱状图数据data:[200,1000,800,500,25,14,950]}]