The invention provides application of an electric pneumatic braking rapid air charging device with an air pressure supplement function, and relates to the technical field of application of carriage braking release. The application of the electric pneumatic braking rapid air charging device with the air pressure supplement function is characterized in that a locomotive supplies air to carriages; a control cable transmits a release instruction electric signal to an electric pneumatic distribution valve through a secondary control branch A, the electric pneumatic distribution valve obtains the release instruction electric signal to work, a release air pipe is connected to a braking branch pipe, and a release air cylinder conducts air charging on a braking main pipe through the release air pipe, the electric pneumatic distribution valve and the braking branch pipe; when the electric pneumatic distribution valve has a sense that the pressure of the braking main pipe is increased, and has obtained the release instruction electric signal from the secondary control branch A, a braking cylinder pipe is connected to the atmosphere; a, phase release of train braking is conducted, and b, direct release of train braking is conducted; and air charging is conducted, wherein air charging begins when train braking is released, in the process that an air compressor which conducts stable pressure output conducts air charging on the braking main pipe, when a serial control device enters the pressure maintaining position, air charging temporarily stops, and when the serial control device is located at the release position all the time, air charging is conducted to enable the constant pressure of the braking main pipe to be achieved.