基于Ｗｉｎｋｅｒ弹性地基梁理论，运用有限元方法，导出了单桩的出口刚度矩阵，进而建立了刚性承台空间群桩的总刚度矩阵．本文方法能十分方便地处理桩身变截面、桩基不规则布置、土体孔洞、软土带、土的非线性及各种边界约束情况．具有一定的工程实用价值． Based on the theory of Winker elastic foundation beam, the finite element method was used to derive the exit stiffness matrix of a single pile, and then the total stiffness matrix of a rigid pile cap space group was established. In this paper, the variable cross-section of the pile, the irregular arrangement of the pile foundation, the nonlinearity of soil pores, soft soil belts, soil, and various boundary constraints can be dealt with very conveniently. Has a certain practical value of engineering.