Abstract: In this paper,analysis is made of the three methods for removal of walnut green husk,that is,retting method,reagent method and mechanical method.These mehocds' influence is researched on quality of walnut nuts,especially for taking off the net rate,broken fruit rate and the effects of ethephon residues.The mechanical method has a high efficieney in taking off the green husk;Ethylene agent would leave a certain residue as compared with the mechanical method.