Abstract: In order to study the rule of the settlement of ground after seam of seismic two sides, which use the different foundation forms, taking some multilayer construction in Beijing as an example, numerical simutation nas been conducted by using of FLAC. The results show that the distribution of settlement are quite different when strip and raft foundations are used respectively and the reasons caused these differences have also been analyzed. It pointed out that when using the strip the foundation reasonable width of it should be gained through the settlement of ground analysis.