操作方法如下：
1.打开PRO-E软件，选择文件打开，将文件类型改为所有文件；
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2.选择要打开的stp文件；
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3.之后将输入新模型的类型改为零件；
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4.最后，stp文件打开成功，结果如图。
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扩展资料：
STP文件是CAD绘图软件的3D图形文件的格式（扩展名），其中包含三维对象的数据;提供对产品模型数据交换的支持。