Vibration monitoring and condition assessment are crucial technical means and management measures for ensuring the safe operation of large wind turbines， especially in the winter freezing environment of Yunnan-Guizhou Plateau， the vibration monitoring and state assessment of the antifreezing test wind turbine is particularly important. The icing random distribution of the wind turbine blade may lead to mass imbalance and aerodynamic shape change among three blades， combined with installation differences of new equipment or auxiliary materials in three blades of wind turbine for antiicing/deicing requirement， so these factors may collectively induce severe vibration of the wind turbine to result with equipment safety hazards. This study employs the active aerothermal method to construct three 5MW test wind turbines， and the primary influencing factors of turbine vibration is analyzed deeply. The vibration monitoring data during four months from three 5MW antifreezing test turbines were employed to calculate 9 key turbine vibration condition variables and comprehensively evaluate the vibration condition in combination with characteristic limit values， and the vibration development trend of each turbine was judged by longitudinally and horizontally comparing. The assessment results indicate that the vibration intensity and its difference among three test wind turbines are smaller， which can operate safely for a long period， and the impact of blade icing and antiicing modifications on vibration is not significant.