Abstract: Piled raft foundation has been used extensively in civil engineering. Based on a rigorous elastic analysis, an integral equation approach is applied to analyze the piled raft, and then the second kind Fedholm’s equations are deduced to solve the problems in this paper. Using the numerical calculation, loads shared by piles and subsoil, the settlement and the load transfer characters are obtained to investigate the working behavior of pile raft comprehensively. The present method is verified with the classical literatures. An extensive parametric analysis is also made to study the behaviors of piled raft. The present method is suitable to analyze a large-scale piled raft and can be applied to practical engineering.