This technology uses agricultural production residues to make biochar and its by-product vinegar, and then develops solid and liquid organic fertilizers to make the products meet the categories and specifications of organic fertilizers. Solid products contain biochar, which not only functions as a fertilizer, but also enhances soil carbon sinks. The liquid product contains vinegar, which is beneficial to the absorption of plant nutrients and promotes growth. At the same time, it can avoid small pests through the taste of vinegar, so that the applicator can save labor. This technology is currently available under a non-exclusive license.