Due to the rapid increase in installed wind power capacity in China, more wind turbines are located in high seismic intensity areas, increasing the potential for seismic disasters. The seismic damage status of wind turbine towers under seismic action is classified into four levels: intact, temporarily out of operation, permanently out of operation, and collapse. A Finite Element Model (FEM) is established for a 2.0 MW onshore wind turbine tower, and 75 earthquake ground motion records are input into the FEM to perform incremental dynamic analysis. The seismic vulnerability curves are built through the statistical regression of seismic response data. The results show that most wind turbines operate normally during seismic activity. The probability of permanently out of operation and collapse under a 2.0 g seismic event is less than 50%, but these events are rare. This damage pattern of wind turbine tower is most likely to occur in Class III site, followed by Class II site and Class I site.