解决方法:billboard加宽高
billboard: {
heightReference: Cesium.HeightReference.CLAMP_TO_GROUND,
image: "../../../../../static/img/POI/餐饮.png",
width: 50,//一定要加!!!!!!!!
height: 50,//一定要加!!!!!!!!
scale: 0.7,
disableDepthTestDistance: Number.POSITIVE_INFINITY,
},