Abstract: Reference design and mechanical transmission related technical principle, in view of the need to tear open outfit them one by one when the car wheel disassembling lock mother, low working efficiency of the present situation, designed a more than the car the same wheels can be lock nut disassembling combination wrench at the same time, can greatly improve the work efficiency, which is applicable to car repair shop, can also be applied to automobile assembly line. This technical plan will provide ideas for front-line technicians to carry out technical innovation, and provide references for automobile assembly enterprises to carry out technical upgrading and production process improvement.