NOVELTY - A nitrogen-rich wheat straw biochar fertilizer comprises 50-60 pts. wt. barley bran, 2-4 pts. wt. calcium acetate, 35-45 pts. wt. sawdust, 4-5 pts. wt. dicalcium phosphate, 7-9 pts. wt. actinolite powder, 10-12 pts. wt. diammonium phosphate, 7-8 pts. wt. ammonium sulfate nitrate, 130-140 pts. wt. fresh Enteromorpha, 6-8 pts. wt. complex microbial inoculum, 230-260 pts. wt. wheat straw, 29-31 pts. wt. fresh urine, and remaining water. The complex microbial inoculum comprises Rhizopus oryzae, Bacillus subtilis and Bacillus cereus in a ratio of 1:2:2.    USE - Nitrogen-rich wheat straw biochar fertilizer for nitrogen fixation.    ADVANTAGE - The nitrogen-rich wheat straw biochar fertilizer has increased nitrogen content, and stabilizes nitrogen content in soil by ensuring long-term supply of nitrogen and reducing nitrogen volatilization.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nitrogen-rich wheat straw biochar fertilizer, which involves cleaning Enteromorpha, crushing with barley bran, sawdust and actinolite powder, mixing, adding to fermentation tank containing 45-50% water, inoculating complex microbial inoculum, fermenting at 70 degrees C for 20-22 days, stirring after every 3-5 days, filtering the fermented mixture obtain the fermentation broth and residue, crushing wheat straw, transferring into carbonization kiln, heating to 550-600 degrees C, charring for 2-4 hours, raising the temperature to 800-900 degrees C, leaving still for 1-2 hours, charring and cooling to room temperature to obtain wheat straw charcoal, adding calcium acetate and dicalcium phosphate to the fermentation broth, heating to 50-60 degrees C, leaving still for 45-60 minutes, adding diammonium phosphate, cooling to room temperature, adding ammonium sulfate nitrate and stirring to obtain nutrient solution, adding fresh urine to the nutrient solution, uniformly mixing, adjusting the pH to 3.9-4.2 by adding citric acid solution, heating and concentrating to 8-12 times of the total weight, adding wheat straw charcoal and adsorbing, drying to obtain dried urine mixture, mixing the residue obtained during fermentation and dried urine mixture, granulating in a granulator, weighing, and packaging.