Abstract: Based on the Timoshenko beam model, the horizontal dynamic equations of a single pipe pile were established by considering the shear deformation of pipe pile. The forces caused by the pile around soil and the pile inner soil on the pipe pile were equivalent to Winkler spring-damper in order to consider the dynamic interaction between the pipe pile and soil, and the elastic coefficients and damping coefficients of Winkler spring-damper were also obtained by using mathematical physical method and continuous conditions of pipe pile-soil. The horizontal dynamic impedance of a single pipe pile considering the shear deformation was got by using the boundary conditions at the pile end and the definition of horizontal dynamic impedance. The contrast analysis and numerical discussion showed that the absolute value of horizontal dynamic impedance of the pipe pile obtained by using Timoshenko beam model was relatively smaller than that of the Euler beam model, and the pipe pile should be more considered the shear deformation than the solid core pile.