Based on the interaction mechanism of pile and soil,and the relationship between the total settlement、pile deformation and the settlement of pile bottom,the paper introduces a method which is used to calculate the pile deformation and pile bottom settlement.The advantage is any pile deformation and pile end settlement under arbitrary load can be calculated.Compare and analyze the data obtained from the method and actual engineering data,it is proved that the result's deviation of the method is smaller,the calculation results are available in the project.