The car has become an indispensable travel tool in life to help us get where we want to go, and the reason it can travel the trajectory of human time is because the steering system is ultimately the steering system of which is the steering. Steering is critical to vehicle safety, driving stability and maneuvering stability and is one of the main vehicle technologies.The steering strip gear has the advantages of low production cost, flexible steering, high rigidity, simple and compact structure, light weight, high positive and reverse efficiency and space saving for easy placement, etc., which are widely used in cars, minibuses and light trucks.This design is based on the technical parameters of Toyota Carrola passenger cars and is built around the car's steering. The main focus is on the choice of steering, comparing the superiority and lack of steering of the gear strip with other steering, calculating the steering gear ratio, and determining the geometric parameters of the gear strip and pinions. By analyzing the principles of each part of the steering, choosing a reasonable structural shape, checking the strength of the main components, determining the geometric parameters and dimensions of the gear strips of the gear, we optimize the design and draw the steering assembly drawing to complete the design.