NOVELTY - Combined anaerobic fermentation and burning treatment of organic waste involves mixing crushed organic waste with water or biogas slurry in sizing mixing tank to form fermentation material and anaerobically fermenting, and collecting produced methane; separating solid from liquid in residual sizing agent discharged from anaerobic fermentation tank to form biogas slurry and dehydrated biogas residue; drying dehydrated biogas residue using methane from anaerobic fermentation tank as heating fuel; and burning dried biogas residue using methane from anaerobic fermentation tank as auxiliary fuel.    USE - Method for combined anaerobic fermentation and burning treatment of organic waste (claimed).    ADVANTAGE - The method can reduce waste using hazard-free treatment operation.    DETAILED DESCRIPTION - Combined anaerobic fermentation and burning treatment of organic waste comprises:    (A) crushing organic waste to particle size lower than 30 mm, mixing the waste with water or biogas slurry in a sizing mixing tank to form fermentation material and anaerobically fermenting in an anaerobic fermentation tank, and then collecting produced methane;    (B) separating solid from liquid in residual sizing agent discharged from anaerobic fermentation tank in a plate frame filter and/or a spiral centrifugal dehydrator, to form biogas slurry and dehydrated biogas residue;    (C) controlling needed biogas slurry to reflux to the sizing mixing tank according to demand of biogas slurry of the sizing mixing tank and discharging the other part of the slurry to a sewage treatment facility;    (D) feeding the dehydrated biogas residue in a drier, using the methane produced from anaerobic fermentation tank as heating fuel, where hot air furnace of methane can be used outside the drier as hot air source for the drier, or a methane combustor is arranged on the drier and a hot air source can be directly formed in the drier; according to different water contents of the biogas residue, the drying time and feeding amount of heat source can be automatically adjusted till the water content of the biogas residue is less than 40%;    (E) burning the dried biogas residue in a burning furnace using the methane collected from the anaerobic fermentation tank as auxiliary fuel for burning the biogas residue; and when the heat value of the biogas residue is low, automatically filling the methane into the burning furnace to ensure that the burning temperature is higher than 800 degrees C; and    (F) producing steam or hot water from a high-temperature flue gas discharged from the burning furnace of the biogas residue in a waste heat boiler, and feeding the flue gas to the fermentation tank as heat source or heat insulating source.