Abstract: A simplified model of the large-diameter pile and layered surrounding soils system is established based on Pasternak foundation and Timoshenko beam models，considering the axial second-order effect of pile shaft. The corresponding analytical solution is derived by utilizing differential transformation method and double-shear theory as well as pile-soil continuity conditions，which is reduced and verified by comparing with existing solutions. On this basis，the effects of the slenderness ratio of pile，thickness of soil layers，pile-soil modulus ratio，shear deformation coefficient of pile shaft and axial force on the horizontal vibration of the pilesoil coupled system are examined via parametric analysis. The results show that the derived solution can give an engineering guide for horizontal vibration analysis and design with respect to large-diameter single pile，which accounts for the shear deformation in?fluences of pile shaft and surrounding soils as well as the axial second-order effect.