我测试过这个代码，它能用。但你可能会检查一下LatLng范围。我不确定我是否做对了。

  //Your markers' array
  const markers = [];
  //Image for pin
  const image = {
    url: "./your/imagge.png",
  };
  //Addlistener for your button
  $("#rand_marker").click(function () {
    //Create LatLng object
    const latLng = new google.maps.LatLng(
      Math.random() * 180 - 90,
      Math.random() * 360 - 180
    );
    //create Marker object
    const new_marker = new google.maps.Marker({
      position: latLng,
      icon: image,
    });
    //Add Marker object to your array
    markers.push(new_marker);
    //Add marker to map (you should have the Map object)
    new_marker.setMap(map);
  });