In order to ascertain the hydrocarbon accumulation characteristics in the Sandaoqiao area of the western Yakela faulted uplift in northern Tarim Basin，based on previous achievement，the oil geochemistry features such as physical prop? erty of crude oil，steranes and terpanes biomarkers and the fluid inclusions obtained from new wells drilled in the study ar? ea have been comparatively analyzed. The results show that there are respectively continental and marine hydrocarbon sources in this area where hydrocarbons are likely to migrate into. And the main periods when the continental and the ma? rine hydrocarbon were generated are both in Himalaya period in this area. The different distributions of these oil and gas are controlled by the pre-Mesozoic geological structure. The boundary of the continental and marine oil is in the convex ridge of the Pre- Mesozoic anticline. The physical properties and geochemical characteristics of crude oil from Well Qiaogu1 and Qiaogu102 in the south convex-ridge are relatively low wax and high sulfur. GC-MS analysis results suggest that the C19-C21 tricyclic terpane is relatively high with C23 as the main peak of tricyclic terpane and the oil is also rich in sulphur fluorine. These physical properties and geochemical characteristics of crude oil from Well Qiaogu1 and Qiaogu102 show that it came from the marine hydrocarbon source of the southern carbonate. On the contrary，the physical and geo? chemical features of the crude oil obtained from Well Qiaogu3 and Well Sha53 drilled at the north of the area are different which indicate continental sourced crude oil.