The invention relates to a novel spray gun. The novel spray gun comprises a gun body, a material inlet and an air inlet, wherein a nozzle is arranged at a gun head of the gun body, and the air inlet is formed in a gun handle of the gun body; the spray gun is characterized in that a spraying liquid chamber is arranged in the gun body, the spraying liquid chamber is connected with the material inlet, the material inlet is connected with a material storage chamber through a feeding pipe, the feeding pipe is a spiral feeding pipe, and the front end of the spraying liquid chamber is connected withthe material storage chamber through a material return pipe; the material return pipe is connected with a material sucking port, a heating wire is arranged at the upper end of the spraying liquid chamber, and the heating wire is connected with a heater; and the spraying liquid chamber is connected with the nozzle. According to the spray gun, the pressure generated when paint enters the spray gun is reduced, and the indoor pressure of the spray gun is reduced; and the residual paint is effectively adsorbed and recycled, after the spray gun stops spraying, the paint can be effectively recycled,so that the paint is prevented from staying in the spraying liquid chamber, the phenomenon that the paint is caked so as to block the nozzle of the spray gun is avoided, the paint is prevented from caking and adhering to the spraying liquid chamber, and the spraying efficiency of the spray gun is improved.