Abstract: It has been studied that the hydrocarbon once found in Hainan-Yuedong structural belt in beach area of Liaohe oilfield all distributes in the main body part, mainly of which are structural reservoirs. The gentle slope belt in the east is of favorable conditions for stratigraphic-lithologic reservoir development but the exploration degree is very low. Aiming at the present situation of few exploratory wells, fully making use of drilling wells data, in combination of seismic reflection characteristics, the sequence stratigraphic framework of the gentle slope zone has been established. Based on the sequence framework, through the sedimentary facies, seismic facies analysis technique, the study on area structure, sedimentary evolution characteristics has been carried out. Combined with wave impedance inversion and attribute analysis, and other means, the reservoir development and distribution have been predicted, the stratigraphic-lithologic reservoir identification and evaluation methods have been put forward, and the favorable development horizon and regions have been predicted.