The invention discloses a quick air inflation, discharge and control device for expanding a balloon. The quick air inflation, discharge and control device for expanding the balloon comprises a handle body, a push handle, a pump body and a connecting piece, the pump body is provided with a pressure releasing component capable of realizing self-locking, the pressure releasing component comprises a grip, a cover body arranged in the grip, a releasing mechanism arranged on the cover body, and a self-locking mechanism capable of locking the releasing mechanism, a shaft hole is formed in the cover body, and a push rod is arranged in the shaft hole and capable of reciprocating along the axial line thereof. The quick air inflation, discharge and control device for expanding the balloon is novel in structure, and the grip is provided with the pressure releasing component capable of realizing self-locking; the quick air inflation, discharge and control device for expanding the balloon conforms to the human engineering, the operation is facilitated, the safety performance is high, and misoperation is avoided; a pressure display component is arranged at one side of the pump body, and the pressure display component is convenient for examining the numbers on the pump body and placing.