<p>The number of retired wind turbine blades has significantly increased, and the disposal of these blades has become a major technical challenge faced by countries around the world. In order to achieve high-value utilization of retired wind turbine blades, fibrous retired wind turbine blades (R) with the chemical treatment were applied to asphalt mixtures (SAM). After chemical treatment, the performance of the asphalt mixture prepared with R-modified as additives was greatly improved, especially in the SAM-R-BLWT sample, whose dynamic stability reached 10,000 times·mm⁻¹ and Marshall stability was 9.8 kN, which was much higher than that of SAM-TA. The results indicated that the asphalt mixture prepared with R-modified as additives fully met the performance index of employment in the asphalt mixture. Through characterization and performance analysis, it was found that there were many functional groups on the surface of R-modified, which could promote the mixing uniformity between R-modified material and asphalt mixture. Combined with the high thermal stability of R, the SAM-R-BLWT sample showed better performance than SAM-TA. The research from this experiment not only achieved large-scale high-value green recycling of retired wind turbine blades, but also provided a low-cost asphalt mixture for highway construction.</p>