In the context of the increasingly fierce competition in the international die casting mould market, the die casting die industry in Japan is also trying to reduce the cost of production. On the market scale, the Japanese recession is the most obvious, regardless of its output value or domestic demand. Japanese die makers attach much importance to polishing and lapping processes in technology, and German die makers start with improving the accuracy and efficiency of machining and discharge machining, so as to reduce manual processing time. The die casting industry in Japan is gradually transforming the mold with low technology content to the areas where the labor cost is low. The trend of accelerating the transfer to Japan is only due to the trend that the production technology is relatively high in Japan.