The utility model discloses an overflow type intelligent air distribution control system which is used for intelligently managing underground mine ventilation. A bifurcate gate and a motor are mounted at an air inlet barrel of a ventilating system, the motor is used for controlling opening and closing of the bifurcate gate, more than one gas sensor and more than one differential pressure sensor are arranged in a roadway, a computer control system is respectively connected with the motor, the gas sensors and the differential pressure sensors, the motor is controlled to adjust opening degree of the bifurcate gate according to received data from the gas sensors and the differential pressure sensors, and supply air rate is further controlled, so that accumulated gas can be slowly and safely exhausted. The overflow type intelligent air distribution control system has the advantages that the supply air rate of the air inlet barrel can be accurately controlled in real time according to concentration of gas in a field, control intellectualization is guaranteed, the gas is safely and reliably exhausted, and safety of a mine is guaranteed.