Pneumatic quick connector

The invention relates to a pneumatic quick connector which comprises a female connector connected with an air inlet pipe and a male connector connected with an air outlet pipe, wherein an air outlet end of the female connector is fixedly provided with a locking sleeve; the inner holes of the female connector and the locking sleeve are internally provided with a check valve core with an exhaust channel; an air inlet end of the male connector is communicated with the exhaust channel of the check valve core; a guide sleeve is clamped between the locking sleeve and the inner wall of the female connector; the check valve core is movably penetrated in the inner hole of the guide sleeve; a valve core spring is supported between the guide sleeve and the check valve core; the head part of the check valve core is sealed, forms a taper shape and is opposite to the air inlet direction of the female connector; the excircle of the head part of the check valve core is provided with a sealing ring slot, and an O-shaped seali