Abstract: With the popularization and application of large megawatt wind turbines, the typical long and high flexible wind turbine towers have become a development trend. However, the dynamic characteristics of long period and low damping make it easy to produce frequent vibration under wind load excitation, which not only reduces the generation efficiency, but also reduces the fatigue life of the generator. In addition, wind turbine's yaw and pitch systems give it multi-directional vibration characteristics. Based on these, a multilayer square tuned liquid damper (TLD) is proposed to control the wind-induced vibration of wind power towers. Based on the principles of structural dynamics and fluid mechanics, the independence of TLD swaying in its orthogonal direction is proved by using Lagrange equation and three-dimensional potential function. The potential function theory is used to establish the coupling model of multilayer TLD-wind turbine system, which can consider the yaw and pitch factors. This model is used to analyze the vibration reduction effect of multilayer square TLD under the influence of yaw and variable pitch system. The results show that the multilayer square TLD is insensitive to the multi-directional vibration characteristics of the structure brought by the yaw and pitch system, and the TLD with different directional angles has relatively stable control performance. However, when the main axis of the wind turbine is not aligned with TLD's, it will significantly increase the wave height of TLD.