NOVELTY - Functional biological slow release fertilizer comprises 10-40 wt.% composite microorganism inoculants and 60-90 inorganic fertilizer. Composite microorganism microbial inoculum and culture matrix comprise 25-50 wt.% Bacillus thuringiensis, 20-40 wt.% Bacillus mucilaginosus, 20-30 wt.% Bacillus megaterium and 15-30 wt.% nitrogen-fixing Paenibacillus. Culture matrix is prepared by mixing 80-90 wt.% organic powder and 10-20 wt.% inorganic powder. Inorganic powder comprises inorganic fertilizer, urea, monopotassium phosphate and little adsorbent.    USE - Functional biological slow release fertilizer used for blueberry (claimed).    ADVANTAGE - The functional biological slow release fertilizer is economic, ensures social and environmental benefits, prevents soil-borne disease, increases crop yield and quality, and improves soil micro-ecological environment.    DETAILED DESCRIPTION - Functional biological slow release fertilizer comprises 10-40 wt.% composite microorganism inoculants and 60-90 inorganic fertilizer. Composite microorganism microbial inoculum and culture matrix comprise 25-50 wt.% Bacillus thuringiensis, 20-40 wt.% Bacillus mucilaginosus, 20-30 wt.% Bacillus megaterium and 15-30 wt.% nitrogen-fixing Paenibacillus. Culture matrix is prepared by mixing 80-90 wt.% organic powder and 10-20 wt.% inorganic powder. Inorganic powder comprises inorganic fertilizer, urea, monopotassium phosphate and little adsorbent, which comprises zeolite, diatomite, vermiculite and attapulgite. Inorganic fertilizer comprises 15-50 pts. wt. ammonium sulfate, 10-40 pts. wt. potassium sulfate, 10-35 pts. wt. monoammonium phosphate, 5-25 pts. wt. humic acid, 5-15 pts. wt. ferrous sulfate, 2-10 pts. wt. EDTA chelated microelement and 5-20 pts. wt. filling agent. Ferrous sulfate is light blue-green particle, where iron content is (20.1%). EDTA chelated microelement is mixture of EDTA chelated zinc, EDTA chelated magnesium and EDTA chelated boron powder shape. Filling agent is selected from clay, talcum powder or bentonite. An INDEPENDENT CLAIM is included for a method for preparing functional biological slow release fertilizer, which involves:    (A) mixing microorganism with composite biologic adsorbent (3-8 times) and granulating to obtain solid microbial inoculums;    (B) mixing remaining components and crushing in a crushing machine and feeding in drum granulator;    (C) heating in a granulating roller at 40-50 degrees C, drying it in cylinder by using hot air drying and then cooling to obtain inorganic fertilizer; and    (D) mixing composite microorganism microbial inoculum and inorganic fertilizer, and then stirring to obtain final product.