Active disassembly product which applies active disassembly using smart materials (ADSM) method uses active disassembly structure as connecting piece of parts, and traditional heating stimulated method is heating the whole product. Electro thermal stimulation method is local heating stimulated method. Because of centralized energy, short heating time and less energy consumption, heat-damage of other parts for the product is very small. Introducing the principle of electro thermal stimulation method, design method of active disassembly snap-fit based on electro thermal stimulation method is elicited. The feasibility of design method is verified by electro thermal stimulation experiment.