NOVELTY - Method for degradation and anaerobic fermentation of mixture of bagasse and kitchen waste to produce biogas, involves (a) preprocessing and crushing kitchen waste, (b) regulating nitrogen ratio and solid-liquid ratio of kitchen waste and bagasse, (c) adding anaerobic granular sludge to a double circulatory expanded granular sludge bed (EGSB) anaerobic reactor for anaerobic digestion, and (d) adding product obtained in step (b) to the anaerobic reactor, maintaining mixture in the anaerobic reactor for 15-24 hours, processing, and producing biogas.    USE - The method is useful for degradation and anaerobic fermentation of mixture of bagasse and kitchen waste to produce biogas (claimed).    ADVANTAGE - The method is environmentally-friendly as it does not cause environmental pollution, produces energy, and easily and rapidly performs anaerobic digestion of kitchen waste.    DETAILED DESCRIPTION - Method for degradation and anaerobic fermentation of mixture of bagasse and kitchen waste to produce biogas, involves (a) preprocessing kitchen waste by screening the kitchen waste, removing large particles, plastic, paper and biological substances which are difficult to degrade, and crushing the kitchen waste using crusher to obtain organic product, (b) regulating nitrogen ratio and solid-liquid ratio of kitchen waste and bagasse by obtaining sugarcane bagasse from factory, mixing the sugarcane bagasse with organic product obtained in step (a), adjusting carbon and nitrogen ratio of mixture to 20-80:1, and then adjusting total solids (TS) of mixture to 1-5%, (c) adding anaerobic granular sludge to a double circulatory expanded granular sludge bed (EGSB) anaerobic reactor for anaerobic digestion, and (d) adding the mixture obtained in step (b) to the anaerobic reactor through a pump, maintaining mixture in the anaerobic reactor for 15-24 hours, controlling reactor temperature at 35 degrees C, removing contaminated material from the mixture, degrading TS, and simultaneously producing biogas.