Using the data of homogenization temperatures of fluid inclusions, burial and thermal history, evolution of palaeostructure，hydrocarbon accumulation period of the Fuyu oil layer in the southern Fuxin Uplift, Songliao Basin， is defined in the end of Nenjiang Formation and the end of Mingshui Formation. On periods of hydrocarbon formation reservoirs, vertical hydrocarbon “reversed migration” is the major hydrocarbon migration way within oil source. The overpressure of K1qn1 mudstone is motivating force of oil migration downward. The source faults are mainly migration pathway of oil migration downward. Hydrocarbon “reversed migration” is the major hydrocarbon migration way in the outer margin and outside of oil source. First, volumes of oil resulting from inner oil source migrated vertically to reservoirs of inner oil source. Then them migrated long-distance laterally to effective traps in the outer margin and outside of oil source through advantage hydrocarbon migration way. On this basis, a model for hydrocarbon accumulations is presented, and it includes following directly drained and reversed migration with lateral migration at a short distance, fault screened trap in the slope, multiple hydrocarbon accumulation and lateral migration at a long distance. It provides an important basis for supporting the new oil rich region of the Fuyu oil layer in the southern Fuxin Uplift, Songliao Basin.