NOVELTY - A wheat straw anaerobic gas yield is improved by normal temperature solid catalyzing aminating pre-process. The method comprises uniformly mixing ammonia-containing solution, catalyst and water, spraying on cut straw, sealing, and preserving at 10-28 degrees C; detecting pH value of material each day during process; adding pre-processed straw and vaccinating material in anaerobic digestion reactor; adding tap water to 80-90% of total volume of reactor to prepare anaerobic reacting solution; and covering and anaerobic reacting material in reactor.    USE - Method for improving wheat straw anaerobic gas yield (claimed).    ADVANTAGE - Gas yield is 17-56.6% higher than that without adding anthraquinone. The anaerobic digest time is shortened by about 41.42%, thus improving production efficiency of anaerobic digestion reactor.    DETAILED DESCRIPTION - A wheat straw anaerobic gas yield is improved by normal temperature solid catalyzing aminating pre-process. The method comprises uniformly mixing ammonia-containing solution, catalyst and water, spraying on cut straw, sealing, and preserving at 10-28 degrees C; detecting pH value of material each day during process, and when pH value tending to stable without obvious changing, finishing pre-process; adding pre-processed straw and vaccinating material in anaerobic digestion reactor; adding tap water to 80-90% of total volume of reactor to prepare anaerobic reacting solution; and covering and anaerobic reacting material in reactor for 25-35 days at 30-35 degrees C. Straw is crop straw such as wheat straw, corn straw and rice straw. The straw is ground to less than or equal to 2 cm using grinder. Ammonia-containing solution is ammonia water (NH3.H2O) and ammonium carbonate (NH4HCO3) at ratio of 20-30:1. Catalyst is anthraquinone (0.05-0.1 wt.%). Dosage of the added water is 2.5-5.5 times of straw dry weight. Straw generally absorbs 6 times of dry weight of water to saturate. Added water is not fully soaked the straw. Mass concentration of straw in anaerobic reacting solution is 5-10%. Mass concentration of vaccinating material is 15-30%.