The invention discloses a method for controlling obnoxious gas of an urban refuse landfill, which belongs to the field of environment protection. The method comprises the following steps: 1) percolate pretreatment: installing aged landfill refuse and porous carriers on filling materials in a reaction vessel, installing a water distributor on the top of the reaction vessel for uniform water distribution, uniformly distributing adjustable perforated aeration devices on the upper middle part of the reaction vessel; and converting organic nitrogen into ammonia nitrogen and converting ammonia nitrogen into nitrate nitrogen under the aerobic condition; and 2) back filling after the percolate pretreatment: selecting proper hydraulic load and back filling frequency in the back filling process, adopting the hydraulic load between 5 and 20 mm/d and the frequency between 6 and 12 times per day, and regulating the factors according to seasons and weather. Through the implementation of the technical scheme of the invention, the obnoxious gas exhaust of the refuse landfill can be effectively controlled, and the air environment condition of the refuse landfill and surrounding areas can be improved. The technology is simple, can be easily implemented, uses waste materials for treating waste materials, has the advantages of economy, environment protection, high efficiency and low consumption, and has practical application value on the control of the obnoxious gas of the refuse landfill.