This paper presents a method for disassembly sequence planning for modular product. In order to improve the efficiency of disassembly, the community structure and knowledge were used in disassembly sequence planning. In this method, community structure detecting algorithm-GN Algorithm was employed to detecting the module of product, and candidate sets of disassembly sequence can be generated according to the module partition evolution process and priority rules, then, according to the knowledge, the optimization of disassembly sequence could be...