Based on the data of three seismic work areas in the Lower Congo Basin, nine typical salt-related tectonic patterns are summarized in the basin and the distribution pattern of salt structures is confirmed. Established with the base tilt angle as a single variable based on the discrete element numerical simulation method, and evolution results of the structure and motion vectors are obtained. With the increase of the basement inclination angle, the flow velocity of salt rock and its overlying sediments gradually increases, and the subsequent terrigenous sediment transport distance is also longer. The basement inclination mainly has three kinds of control effects on the salt rock flow: differential compaction as the master control, differential compaction and gravity gliding combined, gravity gliding as master control. These three control effects are all affected by the basement inclination angle and appear in turn with the change of the angle. Based on the analysis results above, control pattern of basement inclination on salt rock flow in the passive margin basin of the South Atlantic is established.