The invention relates to a nano carbon fertilizer. The fertilizer comprises proper parts by weight of urea, ammonium sulfate, hair, palygorskite, mixed solution of vinyl silane, amino silane and epoxy group silane, mixture of molybdenum fertilizer and manganese fertilizer, ferrous sulfate, nodule bacteria, azotobacter chroococcum, nano carbon, rhizoma curculiginis, cortex pseudolaricis, sophora flavescens, ligninase, plant ash, catalase, and rare earth compound, wherein the weight ratio of molybdenum fertilizer to manganese fertilizer is 1:1, the molar ratio of Si in vinyl silane, amino silane and epoxy group silane in the mixed solution of vinyl silane, amino silane and epoxy group silane is 1:1:0.5, and the concentration of the mixed solution is 1.5%-1.8%. According to the nano carbon fertilizer, the hair is hydrolyzed by an acid so as to generate amino acid, and then the middle and trace elements are chelated so as to be effectively used; the nano carbon fertilizer is applicable to crops like wheat, rice, corn, soybean, oilseed rape and the like, and can improve the cold resistance, drought resistance, disease resistance and insect resistance of the crops; if the nano carbon fertilizer is used by cotton and linen crops, the tension and strength of the fiber can be improved, and the yield and quality are remarkably improved.