Based on Novak’s plane strain theory， a horizontal vibration analysis model of the pipe pile partially embedded in viscoelastic layered soil is established by comprehensively considering the influence of the soil plug effect of partially embedded pipe piles. The analytical expressions in the frequency domain of the surrounding soil and soil plug are obtained respectively by introducing the potential function and variable separation methods. The analytical solution for the horizontal impedance of the partially embedded pipe pile in layered soil is derived by using the pile-soil coupling conditions and the transfer matrix method. The degradation of the obtained solution is compared with the existing theoretical solution to verify its rationality. On this basis， the influence of pilesoil parameters on the horizontal dynamic impedance of the pile head is further discussed by conducting an extensive parametric analysis. The results show that： the horizontal dynamic stiffness and dynamic damping amplitudes of the pile head increase with the increases of buried ratio； with the increases of the elastic modulus of surface soil， the horizontal dynamic stiffness and dynamic damping amplitudes of the partially embedded pipe pile head increase， while the influence of the middle and lower layers around the pile can be ignored； with the decreases of soil plug length， the horizontal dynamic stiffness amplitude of the partially embedded pipe pile head decreases， while the horizontal dynamic damping amplitude of pile head increases.