Piled raft foundations are successfully utilized for supporting structures in different soil layers and can provide safe bearing capacity and serviceability requirements. However, the performance of the piled raft in inclined soft clay layers still remains a challenging problem during analysis. This study aims to investigate the behaviour of piled raft as a foundation system for piles breakthrough an inclined soft clay layer. To achieve this aim, the numerical analysis is conducted on the piled raft foundation through three dimensional finite element modelling. The utilized soil profile in this research consist of four layers the top layer is very loose sand underlain by inclined soft clay layer varied thickness from 3 m to 6 m underlain this layer loose and dense sand. The numerical analyses are applied for studying the effects varied pile length below soft clay, equal pile length below soft clay layer and pile diameter on the settlement and load carrying capacity of piled raft foundation system.. Results show that the settlement is decreased by increasing pile length. Furthermore, the layout of pile has a clear influence on both location and value of maximum settlement for piled raft foundation.