Sheet metal part surface spraying device

The utility model relates to the technical field of sheet metal part processing, in particular to a sheet metal part surface spraying device which comprises a base, a spraying box fixedly connected to the top of the base, a box door hinged to the outer side of the spraying box, a connecting plate fixedly connected to the bottom in the spraying box, a support fixedly connected to the center of the top of the connecting plate, and a servo motor installed in the support. The top of the rotating shaft extends to the outer side of the top of the support, a supporting plate is fixedly connected to the top of the extending end of the rotating shaft, a bottom plate is arranged on the supporting plate, a magnetic suction plate is fixedly connected to the bottom plate, a sheet metal part is magnetically sucked to the magnetic suction plate, and a moving groove is formed in the top, located in the spraying box, above the sheet metal part. A moving block is arranged in the moving groove in a sliding fit mode, a driving a