NOVELTY - Bio-fertilizer comprises 30-40 pts. wt. aquatic product material, 12-16 pts. wt. palygorskite, 6-8 pts. wt. manganese fulvate, 5-7 pts. wt. triple superphosphate, 4-5 pts. wt. tartaric acid powder, 4-8 pts. wt. calcium ammonium nitrate, 26-34 pts. wt. rice bran, 120-140 pts. wt. fresh Enteromorpha, 5-6 pts. wt. composite microorganism inoculants, 230-240 pts. wt. wheat straw, 29-31 pts. wt. fresh urine and balanced amount of water. Composite microorganism microbial inoculum comprises Rhizopus oryzae, Bacillus subtilis and Bacillus cereus in ratio of 1:2:2.    USE - Bio-fertilizer.    ADVANTAGE - The bio-fertilizer absorbs ultraviolet radiation and heat of visible light, increases surface layer soil temperature, balances nutrition, and has chelating ability and temperature preservation effect.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing bio-fertilizer, which involves:    (A) washing Enteromorpha with water, and crushing aquatic product material and rice bran, and then mixing;    (B) placing the mixture in a fermentation pool, adding 52-57% water and inoculating composite microorganism microbial inoculum to carry out fermentation at 70 degrees C for 24-28 days;    (C) pressing and filtering the product to obtain fermentation liquid;    (D) crushing wheat straw and entering into carbonization kiln and heating at 550-650 degrees C for 2-3 hours, and at 770-800 degrees C for 2-3 hours to obtain wheat straw coal powder, and cooling to room temperature;    (E) mixing fermentation liquid and tartaric acid powder and manganese fulvate at 55-65 degrees C for 60-80 minutes and cooling to room temperature;    (F) adding triple superphosphate and calcium ammonium nitrate to obtain nutrient liquid;    (G) mixing fresh urine and nutrient liquid and adding citric acid solution to adjust pH at 4.0-4.6;    (H) mixing fermentation residue with remaining material, granulating in a granulator to obtain granules; and    (I) packaging the granules, and then storing to obtain final product.    An INDEPENDENT CLAIM is included for a method for preparing bio-fertilizer, which involves:    (A) washing Enteromorpha with water, and crushing aquatic product material and rice bran, and then mixing;    (B) placing the mixture in a fermentation pool, adding 52-57% water and inoculating composite microorganism microbial inoculum to carry out fermentation at 70 degrees C for 24-28 days;    (C) pressing and filtering the product to obtain fermentation liquid;    (D) crushing wheat straw and entering into carbonization kiln and heating at 550-650 degrees C for 2-3 hours, and at 770-800 degrees C for 2-3 hours to obtain wheat straw coal powder, and cooling to room temperature;    (E) mixing fermentation liquid and tartaric acid powder and manganese fulvate at 55-65 degrees C for 60-80 minutes and cooling to room temperature;    (F) adding triple superphosphate and calcium ammonium nitrate to obtain nutrient liquid;    (G) mixing fresh urine and nutrient liquid and adding citric acid solution to adjust pH at 4.0-4.6;    (H) mixing fermentation residue with remaining material, granulating in a granulator to obtain granules; and    (I) packaging the granules, and then storing to obtain final product.