EdgeCAM offers a variety of means, and here we focus on the application of Roughing processing methods. This machining method can be used not only for ordinary 2D cavity machining, but also for roughing of 3D surfaces and solid models. Moreover, this processing method also has the functions of rough machining residual material processing, cutting the inclined surface, optimizing the tool path by using the shaped blank, and generating a cycloid machining path suitable for high speed machining. Therefore, it is extremely important to fully grasp the application of this processing method.