The invention discloses a feed capable of reducing methanogenesis of gastrointestinal tracts of buffalos. The feed is composed of following components in percentage by mass (on the basis of air dry matters): 25.00%-27.00% of corns, 7.50%-11.25% of soya bean meal, 3.75%-7.50% of beer residues, 25.00%-27.00% of silo corns, 22.50%-26.25% of pennisetum purpureum schum, 2.00%-7.50% of fermented cassava residues, 0.13%-0.33% of cysteamine hydrochloride and 1.00%-3.00% of sodium bicarbonate. According to the feed, the methanogenesis of the gastrointestinal tracts of milk buffalos is reduced by scientifically matching a rough feed and combining and adding the cysteamine hydrochloride. Different from other methods, the cysteamine hydrochloride is added on the basis of an authorized patent, namely a formula of a feed capable of reducing methanogenesis of gastrointestinal tracts of buffalos (the application number is 201110189541.X; an authorization patent number is ZL201110189541.X), so as to reduce the emission amount of methanol of the gastrointestinal tracts of cud chewers.