Abstract:Use of number of geochemical datas, hydrocarbon source rocks from the maceral of organic matter, organic matter abundance, organic matter type and four aspects of organic matter maturity, Shisanjianfang area of Tuha basin coal measures hydrocarbon source rocks geochemistry characteristics are analyzed, and the results show that the thickness in the study zone from the Jurassic formation is larger, distribution is continuous, the hydrocarbon source rock maturity is higher, is the study of hydrocarbon source rock in the area. The hydrocarbon source rock maturity history in the studied area simulation results show that: (1) Shisanjianfang area of hydrocarbon source rock hydrocarbon threshold depth of 1800 m, the threshold temperature is 95 ℃, enter the time of hydrocarbon generation threshold is about 162 Ma.(2) the current from the in formation temperature is 50 ~ 110 ℃, 0.6% ~ 1.1%, Ro is in peak oil source (3) the research area of hydrocarbon source rock maturity to west, north to south and low in low, its favorable exploration area mainly lies in the northwest of the study area.