Aiming at the problem that the resonant frequency of a three-parameter vibration isolator with a layer X-shaped structure will move to high frequencies, a new type of n-layer X-shaped structure isolator is proposed. Firstly, the harmonic balance method is used to establish the analytical model of the dynamic response of the new vibration isolation system, and the analytical solution is compared with the simulation data obtained by the time-domain numerical solution and the multi-body dynamics software ADAMS to verify the correctness of the built-up model of the isolator with an n-layer X-shaped structure. Based on the established model, the force transmissibility curves of , as well as the traditional two-parameter vibration isolator, traditional three-parameter vibration isolator, and a layer X-shaped structure vibration isolator, are calculated and compared. It is concluded that the proposed vibration isolator with n-layer X-shaped structure can further reduce the peak at resonance, and the resonance frequency ratio moves to lower frequency region. At the same time, the main parameters that affect the performance of the X-shaped structure with n-layers are the damping ratios, the initial angle, the stiffness ratios, which are independent of the excitation force amplitude and the rod length. Furthermore, the influence of the damping ratios，the initial angle and the stiffness ratios on the transmission characteristics of the vibration isolation system is further analyzed. The peak at resonance frequency of the vibration isolator with an n-layer X-shaped structure is further reduced when choosing proper design parameters around the resonance frequency, while the dynamic performance is not changed in high-frequency region.