Abstract：This paper deals with 3rd Member of Palaeogene Shahejie Formation in Linnan area of Huimin sag. Carbazoles data from 69 samples were analyzed and studied, and the results show that carbazole, methylcarbazoles, dimethylcarbazoles and benzolecarbazoles have close relationship with the buried depth, the maturity and the depositional setting. It is concluded that the contents and relative values of the carbazoles can be used as criteria of maturity and depositional setting in future studies.