Wind turbine blades are susceptible to icing caused by frost or rime and other extreme weather conditions in winter, which directly affects the wind turbine output, even leads to safety problems such as ice accumulation and subsequent shedding. Therefore, it is necessary to investigate the anti /deicing technologies for wind turbine blades. In this paper, a deicing method for wind turbine blades based on microwave heating is proposed. To improve the microwave heating performance of the blade, carbon black and carbon fiber are incorporated into the blade composite. The study employs a combination of COMSOL and MATLAB to optimize the parameters of the filling medium within the blade. Subsequently, simulations are conducted to analyze the microwave heating and deicing performance of the optimized blade composite, examining the influences of microwave heating power and ambient temperature on deicing time. The results indicate that the optimum carbon black filling concentration is 3.98%. Under this condition, the carbon fibers within the composite form a sandwich structure?denser at the top and bottom and sparser in the middle, which effectively improves the microwave absorption rate of the composite. Furthermore, it is observed that increasing microwave power and ambient temperature significantly reduce the deicing time, with microwave power exerting a more pronounced effect compared to ambient temperature.