Provided are a green, environmentally-friendly, high-efficiency and low-cost phosphorylation ultra-fast straw fiber adsorption material, a preparation method and an application thereof, which relates to the field of adsorption material preparation and application. The phosphorylation ultra-fast straw fiber adsorption material is obtained by modifying straw powder with phosphorous acid, paraformaldehyde and hydrochloric acid, wherein the specific surface area of the adsorption material is 2.6-2.7m 2/g, and the pore volume is 0.005-0.006cm 3/g.
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