Abstract: Dry winding is an important branch of the winding forming process. The winding process has uniform glue content, high winding efficiency, low environmental pollution and easier industrial automation production. The development of prepreg yarn with good processing properties is of great significance to the promotion and application of dry winding. Through dynamic DSC and constant temperature DSC, combined with the viscosity test, the curing characteristics of the epoxy resin system used were studied. Based on the autocatalytic model, the resin curing reaction kinetic equation was established and verified by comparison with the measured curing degree. A prepreg yarn preparation platform was set up, an improved hot-melt method to prepare dry winding prepreg yarn was adopted, and the influence of different curing degrees on the surface quality of prepreg yarn during the preparation process was analyzed. On this basis, the response surface method was used to analyze the influence of different process parameters (creel tension, winding speed, drying tunnel temperature) on the glue content of the prepreg yarn. The results show that the autocatalytic model is basically consistent with the experimental results, and the best curing range for dry winding prepreg yarn is 5%-10%. The factor that has the greatest influence on the glue content is the winding rate, followed by the unwinding tension. The temperature of the drying tunnel has the least influence. Considering the influence law of various process parameters, the optimized preparation process parameters are obtained: The temperature of the drying tunnel is 180℃, the winding speed is 8 m/min, the yarn unwinding tension is 6 N, and the resin mass fraction is 30.1wt% at this time. The tensile strength of the NOL ring can reach 2536.1 MPa, the tensile modulus is 162.3 GPa, and the interlaminar shear strength is 57.3 MPa.