The invention relates to an Agaricus brasiliensis factorization cultivation method; the Agaricus brasiliensis is cultivated in an intelligent air-conditioning mushroom house, and blowers are arranged in the mushroom house; composite compost comprises the following ingredients: 15 tons of cobs, 5 tons of bagasse, 5 tons of dry chicken manure, 1 ton of rapeseed cakes, 1.5 tons of gypsum, and 0.2 tons of urea; the composite compost employs the tunnel fermentation technology, and pre-moisture, primary fermentation and secondary fermentation can allow the substances in the compost to be fully utilized by the Agaricus brasiliensis; in an Agaricus brasiliensis cultivation process, the intelligent air conditioning and blowers can accurately control the humidity, temperature and carbon dioxide content in the mushroom house, so the Agaricus brasiliensis can properly grow; machine mixing is employed in the fermentation process, thus greatly reducing manual labor; the Agaricus brasiliensis factorization cultivation method is not affected by nature climate, good in product quality, and high in output; the Agaricus brasiliensis can be cultivated at 3-4 seasons every year, and the Agaricus brasiliensis yield can be improved more than 30% compared with a tradition open air artificial mixing fermentation mode.