NOVELTY - Improving anaerobic digestion performance of biomass waste by biofacies separation and optimization technique, where the main devices comprise the acidification phase reactor and the methane production phase reactor, the method comprises solid-liquid separation of the biomass material; starting and running the acidification phase reactor; and starting and running the methane production phase reactor.    USE - The method is used for improving anaerobic digestion performance of biomass waste by biofacies separation and optimization technique (claimed).    ADVANTAGE - The method provides the following advantages: respectively conducting the anaerobic digestion treatment with the solid residue and juice of the material under different conditions; directly sending the liquid phase into the methane production reactor; sending the solid matter into the acidification reactor; starting the optimization by the acidification of the two-phase anaerobic digestion, then entering the methane production reactor, optimizing, acidizing and conducting the methanation with the interphase mass distribution; realizes coupling and linking of the acidification phase and the methane production phase; guarantees the complete and uniform degradation of different materials; improves the pH buffering capacity of the microorganism system so as to greatly improve the feeding load of the whole system; reduces the reactor volume; reduces processing cost and improves the transformation efficiency of the system.    DETAILED DESCRIPTION - Improving anaerobic digestion performance of biomass waste by biofacies separation and optimization technique, where the main devices comprise the acidification phase reactor and the methane production phase reactor, the method comprises (a) solid-liquid separation of the biomass material: removing the hard impurities in the material to be processed, then separating the solid matter and juice in the material with grinder and presser; (b) starting and running the acidification phase reactor: uniformly mixing the solid matter processed by the solid-liquid separation in step (a) and the anaerobic digestion strain according to the ratio of F/M(vs/vs) = 1-3, adding to the acidification reactor, using the first feeding at the starting stage, not adding material after feeding, culturing the system 3-5 days so as to let the acid-forming bacteria completely grow, entering the normal acidification reaction stage, employing orderly fedbatch to feed and discharge material (namely feeding and discharging material a time daily); and (c) starting and running the methane production phase reactor: adding anaerobic digestion strains into the methane production phase reactor, conducting the acclimation by the juice gained in step (a) according to the anaerobic sludge bed feeding and discharging material, adding in the acidification phase discharging material gained in step (b), realizing the coupling and linking of the acidification phase and the methane production phase, then using the acidification phase discharging material and the juice gained in step (a) as the methane production phase feeding material, realizing the biomass anaerobic digestion.