NOVELTY - Polymer emulsion coated slow release fertilizer, comprises (in parts weight): nano-soil (15-20), fermented mushroom residue (10-15), fermented animal manure (18-22), fermented green fertilizer (10-15), slime (15-20), Azofoska (RTM: Nitrogen phosphorus potassium fertilizer) (8-12), starch (5), organic silicon modified acrylate emulsion (10), and crosslinking agent (0.02), where the fertilizer utilizes nanomaterial as carrier.    USE - As polymer emulsion coated slow release fertilizer.    ADVANTAGE - The fertilizer absorbs water reliably, is suitable for long term usage, as it has improved slow release property, and improves quality of agricultural products.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing the fertilizer, which involves (a) uniformly mixing waste mushroom residue, strain, fly ash, organic or inorganic nitrogen source and auxiliary materials, fermenting the mixture for 25-30 days at 65 degrees C or less and germination index of 80% or more to obtain fermented mushroom residue, (b) drying natural soil, pulverizing the dried soil, sieving the pulverized material using a sieve of mesh size of 100-300, adding water to obtain solid-liquid ratio of 1:2.5-6, stirring the mixture, adding special processing solution to the product, heating the mixture to 80-120 degrees C, regulating pH of the mixture to 4.6-7.4, continuously stirring the mixture for 0.5-2 hours, regulating pH of the mixture using sulfuric acid to 4.2-5, subjecting the mixture to interlayer replacement reaction between the natural material rich in montmorillonoid to obtain nano-soil, screening the obtained product, and drying and pulverizing the obtained product to obtain nano-soil, (c) fermenting animal manure and green fertilizer for 25-30 days at 65 degrees C or less and germination index of 80% or more to obtain properly fermented animal manure and green fertilizer, (d) adding the nano-soil, fermented mushroom residue, properly fermented animal manure, properly fermented green fertilizer, slime, Azofoska (RTM: Nitrogen phosphorus potassium fertilizer) and oxidized starch to mixer, and mixing the mixture for 5-6 minutes, (e) adding crosslinking agent to organic silicon modified acrylate emulsion, and spraying the mixture uniformly to the mixed material, and (f) observing and discharging until the product in the mixer generates uniform color, optionally pelletizing the mixture, and packaging and palletizing the obtained product.