Abstract: In order to investigate effects of oxidation state on volatile compounds of yak liver storage at low temperature, the peroxide value ( POV) , thiobarbituric acid reactive substances ( TBARS) and volatile compounds of beef liver from adult yak were determined pre-and post-storage at low temperature with the presence of oxygen. It indicated that TBARS and POV increased by 135.96% and 197.28% through storage, respectively. There were 31 volatile compounds in beef liver with 10 volatile compounds only detected poststorage, such as hyacinthin, E-2-decenal and 2-heptanone. The aldehydes increased by 17.38%, and 3straight aliphatic aldehydes hexanal, heptanal and octanal increased by 8.95%, 3.42% and 1.17%, respectively, with isovaleraldehyde decreased by 1.58%. Ketones decreased by 10.40% with increasing methylketones such as 2-butanone and 2-heptanone, while acetone decreased by 12.45%. There was no significant difference on heterocycles between pre-and post-storage with decreasing benzothiazole reduced by 1.71% significantly (p<0.01) . It showed that the increasing oxidation state could increase lipid oxidation products such as straight aliphatic aldehydes and methylketones, and decrease Maillard reaction products such as isovaleraldehyde and benzothiazole.