Abstract: A general analysis method of piled raft foundation under vertical loading was presented based on the results of piled raft foundation with rigid cap under the same loading condition.Four types of intreraction could be considered herein,i.e.,pile-soil-pile interaction,pile-soil-plate interaction,plate-soil-pile interaction and plate-soil-plate interaction.Cap of foundation was analyzed through finite element method with a rational approach to formulate Reissner-Mindlin quadrilateral element.It was mentioned that pile group could be comprised of piles with various lengths,radiis and stiffness modulis.Raft with any shape and depth could be studied accurately.The method did not involve the discretization of the soil or piles and it could be used to analyze piled raft foundation as simply as to analyze raft foundation.By comparison with the results of other methods,it was shown that the proposed method was reasonable and feasible.