In view of the common problems in quenching machine manufacturing enterprises, such as weak development capacity, long design cycle, manufacturing difficulty and high cost, the modular design of quenching machine was studied on the basis of analyzing the existing module division methods. The relationship between the functional components of quenching machine was described through the parameterbased design structure matrix DSM. The high cohesion within the modules and low coupling between the modules were taken as the division principles, the analytic hierarchy process (AHP) was used to determine the weight of the correlation index, and then the correlation matrix of the comprehensive structure of functional components was constructed. Combined with the hierarchical clustering method, the pedigree clustering diagram was drew through MATLAB software to obtain the division scheme and realize the rapid development of quenching machine tools. Through the modular design, the research and development cycle of quenching machine tool can be shortened, the personalized production can be realized under the condition of mass production, and the diversified needs of the market and users can be quickly responded, so that it can adapt to the increasingly fierce market competition.