Surface polishing equipment for forming large mechanical metal parts

The utility model relates to the technical field of machining, in particular to surface polishing equipment for forming large mechanical metal parts, which improves the fixing effect of the metal parts in the polishing process, improves the polishing effect of the metal parts and improves the practicability. Comprising a first support, a partition plate, a rack, an air cylinder, a first connecting plate, a rotating seat, a second connecting plate, a limiting block, a third connecting plate, a fourth connecting plate, a sliding sleeve, a guide column, a transverse moving mechanism, a polishing mechanism, a vertical moving mechanism and a conveying mechanism, the partition plate and the rack are both installed on the first support, the air cylinder is installed on the partition plate, and a piston rod is arranged at the output end of the air cylinder; the first connecting plate is rotationally connected with the piston rod, the rotating seat is mounted on the rack, the first connecting plate is rotationally con