Abstarct: In recent years, numerous studies have been done on the effect of earthquake load on the behavior of pile-soil interaction. Considering the importance of this issue, much research is still under way. Among these investigations, the presence of water on the dynamic behavior of the pile-clay group and the effects of strain softening can be mentioned. In this research, the effect of groundwater level on settlement in the pile group as well as the moment on the pile group, considering the interaction between the pile-clay group has been investigated, And a comparison between different earthquakes, as well as the effects of density of soils has been investigated. The study was carried out in a 4 × 4 concrete pile group on a laxyer of medium clay. According to the results, the effect of water surface and earthquake magnitude have a significant effect on the settlement and bending strength of the pile group. Also, soil compaction can greatly reduce the settlement.