This article in view of the existing carbon-free car shortcomings, to improve the design. Several kinds of steering mechanism and the current widely used comparative analysis has been made to the body, to select the optimal scheme; The prime mover structure, driving mechanism, driving mechanism for theoretical analysis, it is concluded that it should satisfy the conditions; Size and the transmission mechanism, design and check, make it meet the design requirements. On this basis, using UG software, the establishment of carbon-free car model; To test and verify the feasibility of this scheme to carbon-free car... As the conditions, the car to make use of UG and ADAMS kinematics simulation analysis, the optimum parameter of the car. Prepare for popularization and application of carbon-free car base