ELECTRIC-AIR BRAKE

Disclosed is an electric-air brake, comprising a main air module, a balanced air cylinder pressure control module, a brake pressure regulating module and a parking brake pressure control module. The balanced air cylinder pressure control module includes a balanced air cylinder (1), a first air supply pipeline which communicates with the main air module to supply air to the balanced air cylinder (1), a second air supply pipeline which communicates with the main air module to supply air to a train pipe, and a relay valve (2), wherein the air supply and air exhaust of the train pipe are controlled by the relay valve (2) under the action of the pressure difference between the balanced air cylinder (1) and the train pipe. Under the control of the balanced air cylinder pressure control module, the pressure of the train pipe is gradually changed or the pressure of the train pipe is changed in stages, thereby realizing the adjustment of a braking force of a locomotive in stages, and complying with the UIC 540-2006 Standard Requirements.