Abstract: According to the existing classical theories of consolidation for granular material composite foundation, an analytical theory of consolidation for gravel pile composite foundation is derived considering that the vertical strains of the composite foundation are equal at the same depth, and well resistance and smear effect are taken into account in the derivation of the analytical solutions in this paper. A continuity of the first and the second order differential equations for pore pressure is ensured in the shared boundary of different regions in the derivation. By comparing the theory of consolidation derived in this paper and the existing classical theories of consolidation, analyses of some differences between each theory have been made. Finally, the theory of consolidation derived in this paper has proved that the analytical solution derived in the study is correct by comparing the solution given in the paper, the solutions of existing classical theories of consolidation and FEM analysis results.