Surface treatment device for metal product

The utility model provides a surface treatment device for a metal product, and belongs to the technical field of product surface treatment. The surface treatment device for the metal product comprises a working box body, a driving motor, a driving shaft, a hanging frame, a sand box, a sand pump, a sand blasting pipeline, a sliding sleeve and a connecting sleeve, the driving shaft is sleeved with the sliding sleeve, the sliding sleeve and the driving shaft are limited through the sliding block and the sliding groove, the sliding sleeve is connected to the connecting sleeve through the rotating bearing, and the supporting rods with the hanging frames are arranged at the bottom of the sliding sleeve, so that the driving shaft can drive the sliding sleeve to rotate; meanwhile, the sliding sleeve can be driven by the connecting sleeve to do reciprocating motion in the axial direction of the driving shaft, so that rotation of the hanging frame and lifting in the height direction are achieved, position changes of th