Abstract: In order to study dissolved oxygen level and aging effects of monascus rice wine storage with clay jar,with the glass jar storage wine as control treatment,the dissolved oxygen changes of monascus riec wine storage with clay jar and effects of dissolved oxygen on the main qualities were studied.The results showed that dissolved oxygen content were decreased rapidly in the earlier stage,then slowly increased,and maintained at 7.60 ~7.62 mg / L level.The changes of dissolved oxygen affected its solid except sugar and total esters qualites. The ethanol,total phenol contents were decreased slowly,but the total acid content were increased slightly,solid except sugar and total esters were increased during the storage because of dissolved oxygen oxidation.The total amino acids were decreased,and the bitter taste of amino acids were decreased greatly,the quality of monascus rice wine years storage with clay jar was better than that of the control treatment.