It can be found that uranium correlates with the organic matter in many sandstone-type uranium deposits.This research studies the sandstone-type uranium deposit in Dongsheng area of Ordors Basin,and tries to ascertain the role of organic matter in concent rating uranium.This study primarily illustrates that there is a close relationship between uranium metallogenesis and organic matter,which is significant for studying the reasons of sandstone-type uranium deposit and predict of the formation of the mine.