The shahejie Formation of Paleogene System is the most important hydrocarbon generation interval in Yangxin Sub-depression. Multiplex-set hydroearbon generation series of strata being of different geologieal-geoehemieal eharaeteristies were formed beeause of the staging property of the filling and evolution of Paleogene lake basin and the eyelieity of sedimentary proeess. The organie earbon eontent, the parameters of pyrolysis and biomarker eharaeters of saturated hydroearbon was investigated by using the means of Roek-Eval, GC-MS. The Sha-4 hydrocarbon souree roeks formed under the semi-saline to saline water environment, the eontent of organie matter (TOC) was 1.5% averagely, and most of them was being matured and formed into matured oil;The Sha-3 hydroearbon souree roeks formed under the deep-lake environment with fresh-slight saline water, the content of organic matter (TOC) was 3.5% averagely, and most of them was still immature and formed into immature oil;The Sha-1 immature hydroearbon souree roeks formed under the salt lake-saline water environment, the eontent of organie matter(TOC) was 5.0% averagely, they are formed into biogas.