Abstract: The qualitative and quantitative analysis of light hydrocarbons produced by radiation degradation of N,N-diethyl hydroxylamine are reported. These analyses are performed on the gas chromatography in which a porous layer open tubular column coated with aluminum oxide and a flame-ionization detector are used. When the doses are between 10 and 1 000 kGy,the main light hydrocarbons produced by radiation degradation of N,N-diethyl hydroxylamine are methane, ethane, ethene, propane and n -butane. The volume fraction of methane,ethane, n -butane and propane are increased with the increase of dose. The volume fraction of ethene is also increased with the increase of dose at first, however,when the absorbed dose is higher than 500 kGy, The volume fraction of ethene is decreased with the increase of dose.