NOVELTY - Processing livestock manure and straw, by (a) subjecting livestock manure to solid-liquid separation to obtain residue and liquid, transferring liquid and inoculum to continuous flow stirred-tank reactor and performing wet anaerobic digestion to obtain gas and liquid, (b) crushing straw, mixing with liquid obtained in step (a), performing dry aerobic digestion, refluxing, mixing with liquid, performing dry anaerobic digestion, percolating, and refluxing to obtain gas, and (c) collecting gas, mixing with residue, and feeding into organic fertilizer production line.    USE - The method is used for processing livestock manure and straw which is used for producing organic fertilizer (claimed).    ADVANTAGE - The method enhances mutual contact between material, microorganism and water.    DETAILED DESCRIPTION - Method for processing livestock manure and straw, involves (a) subjecting the livestock manure to solid-liquid separation to obtain residue and liquid having moisture content of 40-50%, adding the separated liquid into pretreatment pool, adding 30% inoculum, stirring uniformly, transferring to continuous flow stirred-tank reactor (CSTR), and performing wet anaerobic digestion to obtain gas and liquid, (b) crushing straw to length of less than 10 cm, spraying water, and turning to obtain first mixed feed with carbon/nitrogen ratio of (20-30):1, (c) mixing the liquid obtained in step (a) and first mixed feed to obtain second mixed feed, adjusting moisture content to 55-65%, performing dry aerobic digestion at 50-60 degrees C by supplying 5-20% oxygen to obtain leachate, refluxing to obtain aerobic digestion product, mixing with the liquid obtained in step (a), adjusting moisture content to 70-80%, performing dry anaerobic digestion at 30-35 degrees C and 300-500 pa to obtain third mixed feed, percolating, and refluxing to obtain gas, and (d) collecting gas obtained in steps (a) and (c) in CSTR, performing desulfurization, mixing with residue obtained in step (a), and feeding into organic fertilizer production line.