The utility model discloses a direct current spray gun, which comprises a gun body, the storage vat, a housing, trigger and handle, rifle front end physically is provided with the nozzle respectivelyand the outside atomizing hood of nozzle is located to the cover, the internal needle valve installation cavity that is provided with of rifle, needle valve installation cavity internalization is provided with the needle valve, the rifle body is formed with the infusion pipeline, the material union coupling is inhaled with setting up to the one end of infusion pipeline in the storage vat, the other end and needle valve installation cavity intercommunication, the tail end of casing is provided with the fan, the internal first wind channel that communicates with nebulization channel that is equipped with of rifle, the handle is provided with the power supply of air supply machine power supply respectively, a trigger switch for controlling the power supply break -make, the internal second wind channel that communicates with the storage vat, the control valve that is used for controlling second wind channel break -make of still being equipped with of rifle, trigger switch, needle valve andcontrol valve all cooperate with the trigger linkage. The utility model has the advantages of simple and reasonable structure, convenient to use, atomization effect is better, and the working property is reliable and stable, is favorable to providing the spraying quality to the work piece.