The invention discloses a locomotive microcomputer display system integrating the functions of a brake display screen. The locomotive microcomputer display system comprises a PC104 single-board computer, an MVB communication card, an RS232 serial port communication card, a CAN communication card, an LONWORKS card, a power control board and an LCD liquid crystal screen; the PC104 single-board computer is used for controlling the microcomputer display system; the MVB communication card is used for being communicated with a locomotive air brake system; the RS232 serial port communication card is used for downloading a locomotive event log; the CAN communication card is used for being communicated with a locomotive main control microcomputer to achieve control over a locomotive and a locomotive state and fault information display function; the LONWORKS card is used for multi-locomotive communication; the power control board supplies a power supply to the PC104 single-board computer, the MVB communication card, the RS232 serial port communication card, the CAN communication card, the LCD liquid crystal screen and backlight heating; the LCD liquid crystal screen has a backlight heating function. According to the system, the whole driver console table is simpler, and operation of a locomotive attendant is easier and more convenient; in addition, due to the fact that the system integrates all the functions of the air brake screen, the air brake screen does not need to be additionally purchased when the locomotive is purchased, the cost is saved, and meanwhile the console space is also saved.