The invention relates to the technical field of electrostatic spraying equipment, in particular to an electrostatic spraying device for workpiece production. By the adoption of the electrostatic spraying device for workpiece production, the amount of powder which is sprayed out and remains in a working box can be reduced, the powder which remains in the working box is conveniently cleaned away, the labor intensity in the cleaning process is reduced, and the usability is improved; meanwhile, the spraying range can be adjusted according to the number of workpieces, the powder is saved, the costis reduced, and the usage reliability is improved; the spraying effect of the workpieces which are hooked on the inner top wall of the working box, a first supporting frame and a second supporting frame are enhanced, and the using effect is improved; and the sand spraying situation of the interior of the working box is conveniently examined in the working process, and the usability is improved. The electrostatic spraying device for workpiece production comprises a base, a support, the working box, a box door, spraying nozzles, the first supporting frame, the second supporting frame, an air blower and an input pipe, and further comprises three discharging pipes, three containing parts, three feeding pipes, three suction heads, first communicating pipes, second communicating pipes and a filtering box.