Brake pressure control device and method

The invention discloses a brake pressure control device and method, a pressure needed by service braking is set through a main adjusting valve, when a load is loaded, the output pressure of an auxiliary reducing valve is supplied to the main adjusting valve for pressure supplement by taking an electromagnetic valve as a carrier, and the brake pressure is increased; stepless change of final output pressure of the main regulating valve can be achieved by controlling connection and pressure maintaining functions of the electromagnetic valve through the controller, and when brake pressure needs to be released rapidly, rapid exhaust is achieved to the maximum extent through an internal one-way valve air channel, and internal throttling of the main regulating valve is avoided. The interior of the remote relief pneumatic control valve and the interior of the brake limiting pneumatic control valve are in a piston type, use is safe and reliable, and response is rapid in function; the internal structure of the brake pr