Vehicle auto-driving technology is a control technology that senses the surrounding environment based on environmental awareness, and controls the steering and speed of the vehicle through the on-board center computer according to the acquired information, so that the vehicle can drive safely and reliably and reach the predetermined destination. Based on the machine vision in automatic driving technology, vehicle signs and signal lights were recognized by on-board camera installed on the vehicle, which allows the vehicle to identify the position of the vehicle and implement braking parking in the process of self-stop parking without human participation. Machine vision measured and judged the function of human eyes by sensors and cameras, which was the trend of vehicle development in the future. Benchmarking parking was only one of the functions that machine vision can accomplish. In the future, through the camera installed on the vehicle, the machine vision of rail transit can be realized, real-time road information can be grasped, and the surrounding environment can be perceived, which will play a more important role in alleviating traffic pressure, improving urban traffic efficiency and improving energy utilization.