stp文件是三维模型设计文件，可以用三维建模软件打开，比如catia软件。具体步骤如下
1、打开CATIA设计软件
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2、点击工具栏中的文件标签
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3、在工具栏的文件标签折叠亏绝菜单中选择打开命令
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4、在自己的本地硬盘中浏览到需要打开的stp文件进行选择
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5、打开后等待CATIA软件对stp文件进行转码,完成后即可显示文件内的三维坦雹零件图形
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