Soil conditioner as well as preparation method and application of soil conditioner

The invention relates to a soil conditioner as well as a preparation method and application of the soil conditioner. The soil conditioner comprises the components based on parts by weight: 10-15 parts of biochemical fulvic acid, 10-20 parts of polyacrylamide, 5-10 parts of burdock oligosaccharide, 5-10 parts of chitosan, 1-5 parts of zinc sulfate, 1-2 parts of boric acid and 50-70 parts of trichoderma pseudokoningii fermentation liquor. The invention also provides the preparation method and the application of the soil conditioner. According to the invention, biochemical fulvic acid and the polyacrylamide are combined, and trace elements zinc and boron, the disease-resistant elicitor burdock oligosaccharide, chitosan and the biological control fungi trichoderma pseudokoningii which are necessary to plants and deficient in the soil are loaded, so that the soil conditioner having the functions of improving the physicochemical property of the soil, inhibiting the soil-borne diseases, promoting the growth of the plants and inducing the resistance of botanical system is prepared, and is environment-friendly.