A plunger-type pneumatic quick-change joint, including an air inlet sleeve, a sliding sleeve spring, an air inlet sealing ring, a valve core, a locking steel ball, a moving sliding sleeve, a sliding sleeve limiter, an air outlet sealing ring and a valve core spring, A pressure relief groove is provided on the inner hole wall of the rear guide hole of the air intake joint along the circumference, and a steel ball hole is provided on the outer circle at the right end of the matching section. The locking steel ball is placed in the steel ball hole, and the air intake joint, The axial sliding limit of the valve core is controlled by the locking steel ball between the valve core and the sliding sleeve. Before the bleed air plug is inserted, the locking steel ball is located in the locking cavity; The stroke groove can ensure the non-shearing contact between the outer circle and the intake sealing ring of the valve core during the opening and closing process, ensuring that the valve core can be closed, opened easily, and has a long service life. Compared with existing similar products, it has simple structure, small radial dimension, long service life, easy insertion of bleed air plug, small pressure loss, and safe and reliable operation.