Abstract: The Maokou Formation in Jiaotan 1 well area, central Sichuan Basin, is located near the platform margin of high-energy beach. Due to the dual effects of paleo-uplift and rifting, two periods of beach facies dolomite are developed, showing the distribution pattern of ' one uplift and one margin ', and the exploration potential is huge. Previous studies have found that under the action of sedimentation and dissolution, the reservoirs of Maokou Formation in the study area are characterized by strong heterogeneity and large changes in reservoir thickness in both vertical and horizontal directions. Therefore, accurate prediction of high-quality reservoirs in Maokou Formation is the key to exploration and development. In this regard, this paper intends to adopt the research idea of ' controlling reservoir by beach '.Firstly, based on geological data and single well characteristics, the vertical distribution characteristics of beach reservoirs in the early and late stages of Maokou Formation are clarified. Secondly, through the restoration of ancient landforms in different periods of Maokou Formation, the evolution analysis is carried out to clarify the coupling relationship between ancient landforms and beach reservoirs. Combined with core, imaging logging and seismic data, the seismic identification model of high quality reservoir is established on the basis of forward modeling. Finally, the comprehensive utilization of seismic facies, paleogeomorphology, seismic attributes and seismic inversion techniques, it is clear that the high-quality beach reservoirs in the study area are mainly developed in the middle and upper part of the second member of the Maoshan Formation, with a thickness of 18-30 m. Horizontally, they are mainly developed in the high part of the paleogeomorphology in the PS6 and PY106 well areas, which are separated by the lithologic dense bodies and have the conditions of independent accumulation. The total area is about 780km², which is the most favorable area for exploration and development in the study area.