Metal product plate surface even paint spraying device

The invention discloses a metal product plate surface even paint spraying device, and relates to the technical field of metal product processing. The device comprises a paint spraying chamber, whereina lifting frame is arranged in the paint spraying chamber, a transverse spur gear rack is arranged in the paint spraying chamber in a sliding manner, a gear I and a gear II which are meshed with eachother are rotationally arranged in the paint spraying chamber, an incomplete gear I and an incomplete gear II are coaxially and fixedly installed on the gear I and the gear II respectively, and the incomplete gear I and the incomplete gear II are alternately meshed with the transverse spur gear rack. According to the device, the transverse spur gear rack is driven by the meshing transmission of the gear I and the gear II to drive a paint spraying head at the bottom to do reciprocating motion left and right to carry out repeated paint spraying treatment on a plate, the paint spraying range ofthe plate is greatly expand