NO is difficult to be rapidly oxidized and absorbed in the wet oxidation method used in the treatment of the NO_x exhaust gases produced in the production process of propellants and explosives, which cause the low absorption rate.To solve this problem, ferrous complex Fe^Ⅱ(EDTA)^2-(Ethylene Diamine Tetraacetic Acid, EDTA)was used as the absorbent of NO in a bubbling reactor.The effects of absorbing solution concentration and NO gas concentration on the absorption rate were investigated.The mass transfer-reaction process of NO absorption was analyzed.The theoretical model describing the NO absorption process was derived.Results show that:under experimental conditions, the absorption rate increases linearly with the increase of NO concentration, and the NO absorbed by Fe^Ⅱ(EDTA)^2- is a pseudo first-order reaction process.The error between calculated values obtained by absorption process model and experimental ones is within 5%, both have good consistency, which can be used to describe the mass transfer-reaction process of NO absorbed by Fe^Ⅱ(EDTA)^2- solution.