NOVELTY - An environment-friendly slow release fertilizer comprises diatomite, wormwood root, magnesium sulfate, zinc sulfate, sodium molybdate dihydrate, rice husk, urea, calcium hydrogen phosphate, sodium bisulfite, tobacco waste, fermentation peat, maggot powder, large flying grass powder, oil tea seed phellodendron, polybutylene succinate, southernwood, sodium dodecyl sulfate, polyethylene glycol 400, jute fiber, maleic anhydride, auxiliary material, and balance chloroform.    USE - Environment-friendly slow release fertilizer.    ADVANTAGE - The fertilizer is environment-friendly and rich in nutrients, has wide source of raw materials and lasting fertilizer effect, does not damage the soil, reduces crop pest, and increases yield.    DETAILED DESCRIPTION - An environment-friendly slow release fertilizer comprises 10-15 pts. wt. 1250-2000 meshes diatomite, 5-6 pts. wt. wormwood root, 4-5 pts. wt. magnesium sulfate, 1-2 pts. wt. zinc sulfate, 1-2 pts. wt. sodium molybdate dihydrate, 10-12 pts. wt. rice husk, 20-22 pts. wt. urea, 12-15 pts. wt. calcium hydrogen phosphate, 4-5 pts. wt. sodium bisulfite, 8-10 pts. wt. tobacco waste, 15-18 pts. wt. fermentation peat, 0.1-0.2 pt. wt. maggot powder, 4-6 pts. wt. large flying grass powder, 12-15 pts. wt. oil tea seed phellodendron, 12-15 pts. wt. polybutylene succinate, 4-6 pts. wt. southernwood, 1-3 pts. wt. sodium dodecyl sulfate, 4-5 pts. wt. polyethylene glycol 400, 4-5 pts. wt. jute fiber, 1-3 pts. wt. maleic anhydride, 4-5 pts. wt. auxiliary material, and balance chloroform. The auxiliary material comprises 14-15 pts. wt. poultry feather, 1-3 pts. wt. nano carbon, 20-30 pts. wt. 30-40% sulfuric acid solution, 8-10 pts. wt. palm oil, 2-4 pts. wt. Tween 60 (RTM: polyoxyethylene (20) sorbitan monostearate), 25-32 pts. wt. diatomite, 1-2 pts. wt. copper citrate, 1-2 pts. wt. manganese citrate, 1-2 pts. wt. zinc citrate, and balance magnesium carbonate. The auxiliary material is prepared by washing poultry feather, sterilizing at high temperature, crushing, adding in sulfuric acid solution, adding nano carbon, uniformly stirring, soaking for 16-20 hours, adding magnesium carbonate, adjusting pH to 6-7.5, adding copper citrate, manganese citrate and zinc citrate, stirring for 2-3 hours, adding palm oil and Tween 60 (RTM: polyoxyethylene (20) sorbitan monostearate), stirring, mixing, dispersing, adding diatomite, uniformly mixing, and drying. An INDEPENDENT CLAIM is included for preparation of slow release fertilizer comprising sterilizing tobacco waste and wormwood root, rice husk, oil tea seed phellodendron and southernwood, crushing, and fermenting to obtain fermentation material; mixing water and diatomite, grinding for 20-30 minutes, adding magnesium sulfate, zinc sulfate and sodium molybdate dihydrate, stirring, mixing for 20-30 minutes, and drying to obtain coating material; mixing polybutylene succinate and jute fiber, adding chloroform, stirring, dissolving, adding sodium dodecyl sulfate, polyethylene glycol 400, large flying grass powder and maleic anhydride, mixing, and stirring for 40-50 minutes to obtain slow release agent; and uniformly mixing remaining raw materials, fermentation material and coating material, granulating, spraying with slow release agent, hot air drying, and cooling to room temperature.