Anaerobic fermentation is carried into the potato processing residue in the fermented method aversion to oxygen.The experiment has three treatments,respectively,with or without rice bran,urea,calcium superphosphate,providing micro-organism with carbon,nitrogen,phosphorus and inorganic salt in the process of fermentation.Through the determination of？anaerobic fermentation products,the content of crude protein grows by 182.78%,protein nitrogen grows by 68.18%,the total acid grows by 307.05% and lactic acid grows by 2646.19%.The？fermentation products can be used as roughage.