Vehicle steering wheel control method and system, control device and vehicle

The invention provides a vehicle steering wheel control method and system, a control device and a vehicle. The steering wheel is connected with a steering column through a locking mechanism. The control method of the vehicle steering wheel comprises the steps that the current underwater entry depth of a vehicle is obtained; judging a size relationship between the current underwater depth and a preset depth; and if the current underwater depth is larger than or equal to the preset depth, the locking mechanism is controlled to be in an unlocking state, so that the steering wheel and the steering column can be separated from each other. According to the control method of the vehicle steering wheel, the connection relation between the steering wheel and the steering column can be controlled, people in the vehicle can pull out the steering wheel from the steering column in time, the steering wheel serves as a window breaking tool to smash a vehicle window, and therefore the people in the vehicle can emergently esc