The five-axis machine tool can process complex curved surfaces with high efficiency, one-time clamping and high precision. At the same time, high-speed hard milling can be used (usually steel materials with a hardness exceeding 56HRC and Rm>2,000N/mm2 The processing performed is called hard machining) provides great application potential for mold processing. High-speed hard milling can supplement the traditional machining process of molds, and in many cases can even completely replace EDM. This allows all mold components to be processed in one clamping, which not only greatly reduces processing time, improves the surface quality and processing accuracy of the profile, but also simplifies the processing process. Since the three processes of electrode manufacturing, electric discharge machining and polishing (or greatly reducing the polishing workload) are saved, the manufacturing cycle of the mold is shortened and the production cost is reduced. For example, make an injection mold made of hot work die steel with a hardness of 56HRC. Using high-speed hard milling, the workpiece can be rough, semi-finished and finished milled into finished products in one clamping. With EDM, the workpiece needs to be rough milled, tempered (while making electrodes), EDM machined and polished. The mold manufacturing time is three times longer than high-speed hard milling.