The invention relates to the technical field of automobile part processing, in particular to automatic equipment for crankshaft polishing. The automatic equipment comprises a base and a controller theautomatic equipment further comprises a discharging frame, a clamping mechanism, a fixing mechanism, a polishing mechanism and a discharging mechanism; the clamping mechanism comprises two groups ofsymmetrically arranged clamping assemblies and air cylinders; the fixing mechanism comprises a first clamping component and a second clamping component, wherein the polishing mechanism comprises a supporting seat and a polishing assembly; and the discharging mechanism comprises a conveyor and a collecting box. According to the automatic equipment for crankshaft polishing, the processing cost is saved while abrasive belt polishing is designed, and the polishing effect and the polishing precision are improved; and meanwhile, a manual tool clamping crankshaft feeding mode is replaced by the automation equipment, so that labor resources are saved, and the enterprise income is improved.