In this paper,the organic geochemical characteristics of the Devonian carbonaceous and black mudstones in the southern margin outcrop of Hefeng basin in northern Xinjiang were analyzed in detail,and its hydrocarbon-generating potential was discussed.The results show that compared with the black mudstone,the carbonaceous mudstone has higher organic carbon content,higher soluble organic matter content,better organic matter type and lower thermal evolution extent,being in immature stage,while black mudstone is in high maturity stage,which is related to abnormal thermal effect.The soluble organic matter content and pyrolysis parameters indicate that the source rocks of the Devonian are still of higher potentials for hydrocarbon generation.