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The electronic products continue to upgrade at present, how to recycle the discarded electronic products is one of the key research of green design. The method of active disassembly using smart material (ADSM) has acquired widespread concerns. For some products, there is a long distance between the internal active disassembly structure and shell, it needs a long time to reach to the stimulation temperature of internal active disassembly structure, and therefore, it is difficult to completely disassemble these discarded electric products by one step. Moreover, it is not conducive to recycling the material if the components and parts of the disassembly products are mixed together, and the efficiency of disassembly is very low. This paper puts forward multi-step active disassembly method of products, it gives specific procedures of classifying steps according to the principle of division, and it proves the feasibility and superiority of the multi-step active disassembly method of products by referring to mobile model.