The invention provides an efficient scutcher. The efficient scutcher comprises a beater roller body which is vertically arranged and a draught fan, wherein one or more of saw teeth, barbed nails and carding beaters are arranged around the surface of the beater roller body; the beater roller body is hollow; an air pipe of the draught pipe is formed by the hollow part in the beater roller body; a plurality of vent holes are formed in the surface of the beater roller body; a vertical filter screen is arranged at the periphery of the beater roller body; a feeding hole is formed in the upper part of the beater roller body; and a dust collection part is arranged at the lower end of the filter screen. A cotton block is fed from the feeding hole; purities and the cotton block are loosened when the cotton block is subjected to the effect of the saw teeth, the barbed nails and the carding beaters in the filter screen and are rapidly released from the beater to enter the dust collection part; meanwhile, air flow of the draught fan is blown out from the vent holes and is used for blowing tiny dust out of the filter screen under the rotation of the beater roller body; meanwhile, the cotton block moves downwards under the action of the gravity until the cotton block moves to the bottommost layer, and the cotton block is cleaned; and a discharging hole is opened and cotton falls out. The device provided by the invention can be used for more cleanly and efficiently treating impurities in the cotton.