Automatic detection equipment for air tightness of breathing tube

Automatic detection equipment for air tightness of a breathing tube comprises an air tightness detection machine provided with a detection head and a conveying belt used for driving a to-be-detected piece to move towards the air tightness detection machine, and further comprises a plugging assembly, a sliding frame and a first power piece used for driving the sliding frame to move back and forth along the conveying belt, and the plugging assembly comprises a plug and a plugging power piece; the sliding frame is provided with a pre-clamping assembly and a positioning assembly, the pre-clamping assembly comprises a pre-clamping block and a pre-clamping power piece used for driving the pre-clamping block to abut against the to-be-detected piece, the positioning assembly comprises a positioning clamping jaw and a positioning power piece, and the positioning power piece is used for driving the positioning clamping jaw to move so that the to-be-detected piece in the positioning clamping jaw can directly face the de