NOVELTY - Modified phenolic resin coated controlled release fertilizer, is claimed. The preparation of the fertilizer comprises evenly mixing biomass phenolic compounds with aldehyde compounds, using the mixture as a coated material, and directly spraying on the surface of the fertilizer granules to obtain cured film; where the coating materials sprayed on the surface of granular fertilizer account for 3-8% of the total weight of the fertilizer particles, the biomass phenolic compounds and aldehydes account for 30-65% and 35-70%, respectively, of the weight of coating materials.    USE - Used as a modified phenolic resin coated controlled release fertilizer.    ADVANTAGE - The fertilizer has accurate nutrient control release property, remains in the soil membrane shell for short period, fully uses waste renewable resource, and uses biomass as film material, thus reduces dependence on petrochemical resource, has sustainable development, is economical, and suitable for large field crops. The preparation is simple, does not need solvent, and is very suitable for large-scale production.    DETAILED DESCRIPTION - Modified phenolic resin coated controlled release fertilizer, is claimed. The preparation of the fertilizer comprises evenly mixing biomass phenolic compounds with aldehyde compounds, using the mixture as a coated material, and directly spraying on the surface of the fertilizer granules to obtain cured film; where the coating materials sprayed on the surface of granular fertilizer account for 3-8% of the total weight of the fertilizer particles, the biomass phenolic compounds and aldehydes account for 30-65% and 35-70%, respectively, of the weight of coating materials; the biomass phenolic compound is obtained by mixing 150-200 pts. biomass, 100-200 pts. phenolic compound and 1-3 pts. catalyst, heating at 200-300 degrees C for 2-4 hours, and cooling in an ice-water bath to 100 degrees C; the biomass is peanut shells, reeds, waste paper, switchgrass branch, algae compound, waste wood, bamboo, rapeseed, grains, sugar cane bagasse, sawdust, bark, straw, rice straw, leaves and/or shoots; the phenolic compound is phenol, catechol, cresol, xylenol, tert-butyl phenol, methylphenol, resorcinol, pyrogallol, bisphenol A, diphenylolpropane and/or hydroquinone; the aldehyde compound is formaldehyde, acetaldehyde and/or acrolein.