您可以从标记本身获取旧图标，更改图标的大小，然后使用更改后的图标调用setIcon:

You can get the old icon from the marker itself, change the size of the icon and then call setIcon with the changed icon:

var icon = centerMarker.options.icon;
icon.options.iconSize = [newwidth, newheight];
centerMarker.setIcon(icon);