Biological weeding organic fertilizer, and preparation method and application thereof

The invention discloses a biological weeding organic fertilizer. The biological weeding organic fertilizer is a solid granule prepared through wrapping a base granule with Sclerotium rolfsii Sacc. SC64 mycelia; a mass ratio of the Sclerotium rolfsii Sacc. SC64 mycelia to the base granule s 1.7-2.0:1; and the base granule is prepared from, by mass, 5-45% of an organic fertilizer, 1.3-28.6% of an adhesive, 10-15% of water, and the balance of a solid matrix. The invention also discloses a preparation method of the biological weeding organic fertilizer, and an application of the biological weeding organic fertilizer in control of dicotyledon weeds. The biological weeding organic fertilizer simultaneously has the advantages of a traditional organic fertilizer and a biological herbicide, so garden wastes and crop straws are fully used to realize changing of wastes into valuables and reduce environment pollution caused by straw burning, and the use of chemical fertilizers and pesticides is reduced to enhance the stress resistance of crops and improve the quality of the crops.