The fast-solid pneumatic rivet machine (self-priming automatic nail-removing machine) is light and beautiful, with light weight, comfortable hand grip and small back-staying force. The product adopts a pneumatic floating switch trigger structure, compared with the traditional lever switch. The trigger structure is more labor-saving, which can effectively reduce the user's fatigue; the rivet stroke is lengthened to meet the customer's requirements; the 360-degree air source connector is convenient for the rivet machine at any angle, and the air source connector has a mesh pattern. The on-off valve can be opened or closed by sliding up and down, saving labor and convenience: the product design structure is simple and easy to clean or maintain.