Abstract: Global intelligent manufacturing technology and its application have entered a stage of rapid development.Metal heat treatment is one of the core technologies in mechanical manufacturing, and its technical development status has become the key to industrial analysis. Based on the patent data. The trend of patent application for metal heat treatment technology in China and the world and the types of applicants were summarized. Using social network, the technical layout,core technology and life cycle of many countries in this field were focused on. It is found that at present, the metal heat treatment technology in China is mainly in the hands of colleges and research institutes, the degree of marketization is low,and the technical level of enterprises is backward. In the absence of core equipment technology, Chinese enterprises mainly focus on basic manufacturing process and lack core competitiveness. Finally, some countermeasures and suggestions are put forward for the development of related enterprises in China, hoping to provide reference for promoting the healthy development of manufacturing industry in China.