The invention discloses an electric box production machining device. The electric box production machining device comprises an operation table, an isolation cover, a positioning assembly, a paint spraying assembly, a fan and an exhaust fan, wherein the isolation cover is arranged at the upper end of the operation table, the positioning assembly is arranged on the operation table, the paint spraying assembly is arranged on the isolation cover and located above the positioning assembly, the fan is arranged inside the isolation cover, and the exhaust fan is arranged outside the isolation cover. According to the electric box production machining device, paint processing equipment is arranged, so that paint is fully mixed, and the paint spraying effect is guaranteed; the positioning assembly isarranged, and an electric box board to be painted is fixed on a positioning table, so that the situation that the paint spraying efficiency and the paint spraying effect are reduced during paint spraying due to the fact that the electric box board to be painted is displaced is avoided; the positioning table rotates during paint spraying, so that paint spraying is uniform and comprehensive; the fan is arranged to supply air to the electric box board, a heating plate is electrified and heated, generated hot air is used for accelerating drying of the paint, and the drying speed is increased; andmeanwhile, the exhaust fan sucks off the peculiar smell of the paint and sends the peculiar smell to an external purification device for waste gas treatment, so that the pollution of the peculiar smell of the paint to the environment is avoided.