Commercial fish grading and scaling equipment

The invention discloses commercial fish grading and scaling equipment. The commercial fish grading and scaling equipment comprises a feeding strip on which a front dumbbell brush and a front strip-shaped brush are arranged in a conveying direction at intervals, wherein a guide plate in the shape of a horn-shaped opening is arranged in front of the front dumbbell brush, and a spray pipe is arranged near the guide plate; a surface change drum is arranged at an end part of the feeding belt, and a clamping belt capable of being clung to the feeding belt is arranged in a position close to the surface change drum; a discharging belt is arranged near a lower side surface of the clamping belt; a back dumbbell brush and a back strip-shaped brush are arranged on the discharging belt in the conveying direction at intervals; a drum screener capable of performing size screening is arranged near a lower side of the end of the discharging belt. A fish body enters a clamping gap between the feeding belt and the clamping belt, is moved for about a half circle and is turned over, so that the other side of the fish body can be scaled. The equipment has the advantages of capability of grading fishes and scaling double sides of each fish, good scaling effect, little manual intervention and low fault rate.