Pile foundation platform is widely used in coastal soft soil foundation.We carry out the numerical simulation of an irregular pile foundation platform,firstly establish the three-dimensional finite element model of a large platform project by using ANSYS finite element analysis software,select a suitable contact model to simulate the interaction of pile and soil,and carry out the whole operation of the model after applying the design load.The results show that in the model,the maximum friction stress near the height of the pile height 12.5 m is reached under the pile-soil interaction,and the maximum of the few friction stresses occurs at the height of 10 m or 15 m at the pile height.The frictional stress of piles increases continuously along the direction of horizontal load.