Gravity sliding can be divided into two sorts, the lateral and the vertical. Instanced by the sliding structures developed in Bohaiwan and Junggar basins, six types of lateral gravitational sliding structures are introduced, which includes a sliding fault step, an inverse drag anticline, a stratigraphic compensating graben-like anticline, aslide-fall anticline, a sliding overthrust structure (i.e. inversed contemporaneous fault), and a sliding nappe. Their forming origin and mechanics are analyzed. All of these structures can be favorable hydrocarbon-bearing traps. Itis suggested that a great attention should be paid to them in exploration. It is specially analyzed and indicated that the Maxi fault developed in Jizhong Depression is a typical sliding nappe, instead of a reversed fault, resulted from lateral compression of gravitational sliding movement. Racrystalline pores and intracrystalline solution pores are common.