可以通过使用PS建立一个透明的为图片，然后在微信上传头像时，将该图片无限放大后使用即可以使得微信头像是透明的了，具体的操作方法如下：
1、打开PS软件，点击左上角的文件选择新建按钮。
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2、在出现的新建对话框中输入如300*300像素，分辨率为300，背景内容选择透明以后点击确定按钮。
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3、点击PS软件左上角的文件选择存储为按钮。
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4、在出现的存储为对话框中，将图片的格式选择为PNG后点击保存按钮。
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5、在电脑上登录微信以后，将该透明图片发送到微信。
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6、打开手机微信，将该图片进行保存。
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7、点击手机上的微信头像。
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8、在出现的选择图片界面，点击所有图片。
/iknow-pic.cdn.bcebos.com/1e30e924b899a9014376914c12950a7b0208f50d"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/1e30e924b899a9014376914c12950a7b0208f50d?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="https://iknow-pic.cdn.bcebos.com/1e30e924b899a9014376914c12950a7b0208f50d"/>
9、找到保存图片的文件夹后点击进入（该透明图片在手机微信上显示的是纯黑色的）。
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10、进入以后点击刚才保存纯黑色的图片，将手指放在黑色区域以中心为原点不断的放大该图片。
/iknow-pic.cdn.bcebos.com/d0c8a786c9177f3ec9ec36777fcf3bc79e3d56f4"target="_blank"title="点击查看大图"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.com/d0c8a786c9177f3ec9ec36777fcf3bc79e3d56f4?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto"esrc="https://iknow-pic.cdn.bcebos.com/d0c8a786c9177f3ec9ec36777fcf3bc79e3d56f4"/>
11、然后点击使用按钮，将该图片作为头像。
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12、回到聊天界面给好友发送消息时即可看到该头像已经是透明的了。
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注意事项：
透明的的PNG图片不仅仅可以用于微信头像，在日常的图片处理中涉及到不需要背景色或边框时均可以使用。