Commercial vehicle coordination type braking system and control method

The invention relates to a commercial vehicle coordinated braking system and a control method. The commercial vehicle coordinated braking system comprises a control unit which is connected with a main braking system and an auxiliary braking system; specific auxiliary braking is provided according to the type of the vehicle, and the braking force can be controlled by a corresponding electric control unit; in the braking process of the vehicle, the whole vehicle control unit detects the braking requirement of a driver, and meanwhile, in combination with the working state of the auxiliary braking system, the braking force of the vehicle in the early braking stage is controlled to be all provided by the auxiliary braking system. When the braking force of the auxiliary braking system cannot meet the braking requirement, the whole vehicle control unit adjusts the proportional electromagnetic valve of the main braking gas circuit and controls the main braking system to conduct braking force compensation ...