Abstract: It is most important to make correct iden ification of kerogen types and to judge properly the interrelations among the type parameters, so as to correctly assess oil generation potential and its resources. We have reported the study on type parameters of Tertiary kerogen in Eastern China. In this paper, using the analytical data of element composition, Rock-Eval, infrared spectrum, carbon isotcpic composition, pyrolysis gas chromatography, and X-ray diffraction, the chemical composition and structural characteristics for the Upper Paleozoic kerogens of Junggar Basin, and the interrelation among various types of parameters are studied. Some boundary values of kerogen classification are corrected and a few new parameters are added. In the end of this paper, geochemical parameters of kerogen types are compiled in a table which can be regarded as basis for correct classification of kerogens.