At present, all major automobile manufacturers have launched steer-by-wire, and the rapid development of it has freed the steering mechanism from mechanical constraints, making four-wheel independent steering possible. The four-wheel independent steering electric vehicle has stronger tracking performance, and more stable steering, and can perform actions such as diagonal movement, lateral movement, and pivoting, with strong maneuverability. It has incomparable advantages over traditional vehicles in urban congested roads, narrow spaces, and other scenarios. In this paper, aiming at a corner module system based on double wishbone suspension and adopting double crank steering mechanism, mechanism parameter optimization, prototype design and kinematics simulation test are carried out. The results show that the angle module system has compact structure and high integration and can realize a large steering angle of 90.