Air tightness detection tool for cylinder gasket

An air tightness detection tool for a cylinder gasket comprises an upper template and a lower template, a backing plate and an upper die are sequentially fixed below the upper template, two air channel grooves which are nested with each other are arranged on the upper surface of the upper die, two air inlet holes are arranged in parallel on the upper die along the horizontal direction, and the inner ends of the two air inlet holes are respectively communicated with the two air channel grooves in a one-to-one correspondence manner. A plurality of air guide holes are respectively formed in the two air channel grooves; sealing rubber pads are clamped between the base plate and the upper die and are arranged on the inner sides and the outer sides of the two air channel grooves; a lower die is fixed on the lower die plate, and a conical male die and a special-shaped male die are respectively fixed on the left side and the right side of the lower die and are used for positioning a cylinder gasket to be detected; li