The invention relates to cutting-proof yarn, which is characterized in that the cutting-proof yarn is skin-core composite yarn which is manufacturing through adopting a two-dimensional weaving and molding method, core-spun yarn of the cutting-proof yarn is high strength polyethylene fiber non-twist filament, the fineness is 400-1200 deniers, epiboly yarn of the cutting-proof yarn is aramid fiber filament soft twist yarn, the twisting tension is smaller than or equal to 25twist/10 centimeter, the fineness is 150-200 deniers, the volume ratio between the core-spun yarn and the epiboly yarn is 0.05-0.5, a two-dimensional weaving and molding method whose braided angle is alpha is adopted to coat the epiboly yarn outside the core-spun yarn evenly, the braided angle alpha is 15-45 degrees, the yarn carriers number of yarn carriers of knitting machine which are used in the two-dimensional weaving and molding method is an even number between 8-16. The cutting-proof yarn of the invention has good cutting resistant property.