The p-y curve method adequately considers soil plastic deformation and resistance limit values.However,this method is based on a pile-soil spring calculation approach derived from single-pile horizontal static load tests and cannot be directly applied to the interaction between sheet pile and soil.We propose a p-y curve reduction method suitable for the interaction between sheet pile and soil by introducing the p-y curve reduction coefficient,and compare the results to Plaxis finite element model results and on-site displacement observations to varify the accuracy of this method .The results show that this method can fully consider the nonlinearity of soil spring and the limit value of soil foundation counter-force,which makes up for the shortcomings of m method and p-y curve method.