Abstract: The horizontal and vertical characteristics of nearly 30 faults in the Fulongquan Fault Depression in the southeastern uplift of the Songliao Basin were analyzed. According to the epochs and controls of these faults, we classified them into three stages and three levels. The level 1 includes depression controlling faults, the level 2 includes synsedimentary faults, and the level 3 includes accommodation faults. On the western slope of the Fulongquan Fault Depression, there mainly develop level 2 and level 3 faults. Meanwhile, based on the hydrocarbon shows revealed by wells on both sides of the fault F6 on the western gentle slope, we analyzed the conducting and sealing effects of faults on hydrocarbon. A large number of induced fractures were developed on the active side of faults. Mudstones on the passive side laterally block oil and gas. It confirms that the active side of faults is favorable for hydrocarbon migration, while the passive side is favorable for hydrocarbon sealing. Based on the difference between the combination of sedimentary and accommodation faults, we identified the controls of fractures on hydrocarbon accumulation in primary and secondary reservoirs on the western slope of Fulongquan Fault Depression.