N,　N-diethylhydroxylamine　(DEHA)　is　a　novel　salt-free　reducing　agent　used　in　separating　Pu　and　Np　from　U　in　the　reprocessing　of　spent　nuclear　fuel.　In　this　paper,　we　report　the　study　on　gamma-radiolysis　of　DEHA　in　water　and　its　radiolytic　liquid　organics　by　gas　chromatography.　The　radiolysis　rate　of　DEHA　increases　with　the　absorbed　dose,　but　decreases　with　the　primary　DEHA　concentration　at　0.1-0.5　mol.L(-1)　irradiated　to　10-1000　kGy.　The　main　organics　produced　in　radiolysis　of　DEHA　are　acetaldehyde,　acetic　acid　and　ethanol.　The　concentration　of　acetaldehyde　increases　with　the　primary　DENA　concentration　and　the　absorbed　dose　at　＜=　500　kGy,　but　over　500　kGy　it　decreases　with　increasing　dose.　The　dependence　of　the　concentration　of　acetic　acid　on　the　absorbed　dose　is　similar　to　that　of　acetaldehyde,　with　a　lower　turning　point　of　the　dose,　though.　The　ethanol　concentration　changes　differently　among　the　irradiated　samples　of　different　primary　DEHA　concentrations,　and　this　is　discussed.　The　maximum　concentrations　of　acetaldehyde,　acetic　acid　and　ethanol　are　0.029,　0.014　and　0.028　mol.L(-1),　respectively.