NOVELTY - Producing methane by high solid two-phase three-section anaerobic digestion of perishable organic garbage comprises: (a) hydrolyzing perishable organic garbage in hydrolysis acid production reactor and generating soluble saccharides, amino acid, long chain aliphatic acid and glycerol; (b) linking the bottom part of hydrolysis acid production reactor and the bottom of methane production reactor and carrying out acid production reaction; and (c) periodically clearing partial perishable organic garbage hydrolysis residue from unloading material opening of the hydrolysis acid production reactor.    USE - The process is useful for producing methane by high solid two-phase three-section anaerobic digestion of perishable organic garbage (claimed).    ADVANTAGE - The process separates hydrolysis acid production process of anaerobic digestion process from acetic acid and methane production process; where it avoids the event that the organic acid produced by perishable organic garbage restrains methane production action. Moreover, the device used for producing methane has simple process, low cost, easy maintenance, and stable performance; where it is appropriate for anaerobic digestion process of all kinds of perishable organic garbage; and it has effective and stable anaerobic digestion and methane production capability of perishable organic garbage.    DETAILED DESCRIPTION - Producing methane by high solid two-phase three-section anaerobic digestion of perishable organic garbage comprises: (a) hydrolyzing perishable organic garbage in hydrolysis acid production reactor, generating soluble saccharides, amino acid, long chain aliphatic acid and glycerol, acidizing hydrolyzed mixture, generating mass micromolecule organic acid products; where the hydrolysis acid production reactor uses solid filtering bed; and the perishable organic garbage is put above the filtering filler of the filtering bed; spraying perishable organic garbage by using water from spray head, dissolving organic acid produced by hydrolysis acid production reaction in the water, forming filter liquid by filtering filler and multihole plate, and storing at the bottom of the hydrolysis acid production reactor; (b) linking the bottom part of the hydrolysis acid production reactor and the bottom of methane production reactor by cycle pump and pipeline; where the top part of methane production reactor and the top part of hydrolysis acid production reactor are linked; carrying out acid production reaction in the methane production reactor, generating acetic acid, hydrogen and carbon dioxide from organic acid product except for acetic acid generated in acidizing of (a) under action of producing acetic acid bacteria; continually doing methane production reaction, fermenting acetic acid under action of acetic acid nutritional type methane bacteria production and generating methane and carbon dioxide, fermenting hydrogen and carbon dioxide under action of hydrogen nutritional type methane bacteria production and generating methane; where the main body of the methane production reactor is fiber filling bed reactor on the upper part; and the fiber filler can produce acetic acid bacteria and methane bacteria; improving thickness of acetic acid bacteria and methane bacteria produced in the methane production reactor and improving performance of producing methane; where the filter bed is installed a the bottom of the methane production reactor for remaining grain organic matters in the filter liquid, which avoids blocking of fiber filler bed; the filtered liquid produced by (a) flows the methane production reactor; and the organic acid of the filter liquid is generated into methane and carbon dioxide under subsequent action of acetic acid bacteria and methane bacteria production; and (c) periodically clearing partial perishable organic garbage hydrolysis residue from unloading material opening of the hydrolysis acid production reactor to improve effective processing size of the reactor; periodically clearing partial perishable organic garbage filter liquid precipitate from residue discharging opening of the hydrolysis acid production reactor to improve effective storage size of filter liquid; and periodically washing and filling filter filler in the filter bed of the methane production reactor to ensure good filter effect.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the device for producing methane by high solid two-phase three-section anaerobic digestion of perishable organic garbage.