Abstract: The coupling relationship between tectonic activity and alluvial fan deposits is one of the hot spots and difficulties in tectonosedimentology research. Uncommon and widespread sandy conglomerate bodies are developed along the faulted zone in the northwestern margin of Junggar basin. Therefore, studies on the controls of tectonic activity on alluvial fans and hydrocarbon accumulation are of great theoretical and practical significance. Using the data of cores, logging and seismic profiles, this paper studies the distribution of structurecontrolled alluvial?fan sandy conglomerate bodies, and the hydrocarbon accumulation patterns combined with related oil and gas accumulation data. It is shown that the stacking pattern of alluvial fans is closely related to the activity of contemporaneous faults, and there are 3 typical distribution patterns of the fans under the control of contemporaneous faults, which include the retrograded alluvial fans against the source direction and controlled by normal comb?like fault combination, the laterally superimposed alluvial fans and vertically stacking alluvial fans controlled by reverse comb?like faults and crossing faults, and the progradational alluvial fans controlled by preceding faults. Tectonic activity has significant impact on provenance, landform and local climate during the formation of these alluvial fans. These factors jointly control the development and sedimentary sequence differences of alluvial-fan sandy conglomerate bodies at different positions of the structures. It is concluded that alluvial-fan sandy conglomerate reservoir forms under the effects of both structure and lithology, which is characterized by one reservoir in one fan, several reservoirs in one fan, and one reservoir in several fans