NOVELTY - Dry-wet coupling anaerobic fermenting method, involves performing wet-type and dry-type anaerobic fermenting method. The wet-type anaerobic fermenting method is carried out by transferring mixture of excrements and water into acid producing pool and a methane producing pot to obtain methane and biogas waste and biogas fluid. The dry-type anaerobic fermenting method is carried out by adding wooden fiber degrading bacteria into smashed straws, mixing straws and bacteria and transferring the mixture into fermenting pot to obtain permeated biogas waste and biogas fluid.    USE - The dry-wet coupling anaerobic fermenting method is useful for producing methane for separating biogas waste and biogas fluid in processing technology of environment protection and animal husbandry wastes.    ADVANTAGE - The dry-wet coupling anaerobic fermenting method is easy to handle, and is environmentally-friendly.    DETAILED DESCRIPTION - Dry-wet coupling anaerobic fermenting method, involves wet-type anaerobic fermenting method and dry-type anaerobic fermenting method. The wet-type anaerobic fermenting method is carried out by transferring mixture of excrements and water into an acid producing pool and a methane producing pot to obtain methane and biogas waste and biogas fluid, storing the obtained methane into a methane storing device after purifying methane for thermoelectric linked production or concentrated methane supply work. The dry-type anaerobic fermenting method is carried out by adding wooden fiber degrading bacteria into smashed straws, mixing straws and bacteria, transferring the mixture into a dry-type anaerobic fermenting pot, fermenting the mixture in dry-type anaerobic fermentation to obtain permeated biogas waste and biogas fluid, discharging the biogas residue using discharging device for composting the mixture, and transferring the permeated biogas fluid into the dry-type anaerobic fermenting pot for spraying the fluid to compensate nitrogen. The method involves transferring biogas waste and biogas fluid generated in a wet-type two-phase anaerobic fermenting into a mixed material of straws and wooden fiber degrading bacterium system in a dry-type anaerobic fermenting method to supply water, supply nitrogen and seed, the methane produced by the wet-type two-phase anaerobic fermenting method into a dry-type anaerobic fermenting pot in the dry-type anaerobic fermenting method to separate biogas waste and biogas fluid, and transferring the permeated biogas fluid produced by the dry-type anaerobic fermenting method into a material of excrements and water in the wet-type two-phase anaerobic fermenting method.