Vehicle steering follow-up mechanism and control method

The invention provides a vehicle steering follow-up mechanism and a control method, and belongs to the technical field of vehicles. One end of the locking air cylinder assembly is connected to an axle of the third shaft, the other end of the locking air cylinder assembly is connected to a transverse pull rod of the third shaft, the locking air cylinder assembly is connected with the air storage cylinder through a pipeline, and air is conveyed to the locking air cylinder assembly through the air storage cylinder; the steering angle sensor is installed on a steering wheel of the vehicle and electrically connected with a controller in the vehicle, when the vehicle speed is larger than 40 km/h, and the steering wheel rotation angle detected by the steering angle sensor is smaller than 180 degrees or when the vehicle backs up, the air storage cylinder inflates the locking air cylinder assembly, and the locking air cylinder assembly is driven by the air storage cylinder to rotate. And the axle does not swing left a