The utility model provides a full automatic discharge system of bulk cement transport vechicle, a pressure sensor for gathering pressure signal in the gas storage tank body of chassis, engine oil door electric putter, an air compressor machine speed sensor for gathering air compressor machine rotational speed signal, electromagnetism air valve group, the discharging valve group that links to each other with electromagnetism air valve group, a thereby, extension elongation control engine throttle size for being based on the pressure signal control engine throttle electric putter of pressure sensor feedback, a rotational speed signal closed loop adjustment air compressor machine rotational speed for being based on the pressure signal and the air compressor machine speed sensor feedback of pressure sensor feedback, a main control board for being based on the work of the pressure signal control electromagnetism air valve group's of pressure sensor feedback output control power. The utility model discloses need not manual operation, very big improvement the intelligent control of whole car, do not have the intervention that needs operating personnel when unloading, not only realized the full automation control of unloading, simultaneously also greatly reduced working strength, improved the technical content of whole car.