In order to solve the problems of low disassembly efficiency and complex equipment caused by identifying screw types in advance and replacing screwdriver to match different types screws in automatic disassembly equipment,a new automatic disassembly screwdriver was designed.The physical conflict that the traditional screwdriver could not disassemble cross recessed screw and slotted head screw at the same time was determined by using the TRIZ theory.By analyzing the similarities and differences of the structure characteristics of the cross screwdrivers and the straight screwdrivers,the initial plan of the new screwdriver was designed by using the dynamic principle of the time separation principle.To overcome the defect of the substance-field model of the designed plan,the general solution method of TRIZ theory was adopted to optimize the structure and the design of the new screwdriver was completed.The results show that the new screwdriver has the advantages of simple structure,meeting the needs of different disassembly scenes and saving disassembly time,which improves the efficiency of automatic disassembly and helps to improve the function of automatic disassembly equipment.