The invention provides an anti-oxidation non-aqueous decarbonization solution for trapping carbon dioxide in a mixed gas, and belongs to the technical field of carbon dioxide gas trapping. The invention relates to a non-aqueous decarbonization solution, which is composed of a main absorption component N-ethylethanolamine and a solvent N, N-diethylethanolamine. The non-aqueous decarbonization solution has high boiling point, low viscosity and fast absorption rate for carbon dioxide. The absorption capacity is high and the product is easy to regenerate. By adding the antioxidants 2-butanone oxime, pyrogallol, carbohydrazide and N, N'-bis(salicylidene)-1,2-propylenediamine, the main absorption component and the solvent can be effectively prevented from being oxidized by oxygen, thus guaranteeing good performance and service life of the non-aqueous decarbonization solution. The non-aqueous decarbonization solution of the invention is mainly used for trapping carbon dioxide in various chemical reaction tail gases, tail gases from steel plants and cement plants, ore decomposition gas, combustion flue gas, natural gas, city gas and biogas, and has a broad application prospect.