NOVELTY - A wheat-straw biochar fertilizer comprises 30-40 pts. wt. coffee dregs, 40-45 pts. wt. cassava slag, 18-20 pts. wt. potassium monohydrogen phosphate, 4-6 pts. wt. ferrous sulfate, 5-7 pts. wt. calcium nitrate, 14-16 pts. wt. attapulgite powder, 12-15 pts. wt. coconut, 120-140 pts. wt. fresh sea lettuce, 6-8 pts. wt. composite microorganism inoculant, 230-250 pts. wt. wheat straw, 28-32 pts. wt. fresh urine, and water. The composite microorganism inoculant comprises Rhizopus oryzae, Bacillus subtilis, and Bacillus cereus in a ratio of 1:2:2.    USE - Wheat-straw biochar fertilizer (claimed).    ADVANTAGE - The wheat-straw biochar fertilizer is light and porous, can be applied to soil directly after production, and provides sufficient growth space for roots. Coconut promotes root system. Ferrous sulfate and calcium nitrate provide the required elements and increase lodging resistance of crops.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of fertilizer, which involves washing and crushing sea lettuce, mixing with coffee dregs and cassava slag, adding to fermentation pool, adding water to adjust water content to 50-60%, adding composite microorganism inoculant, fermenting while turning every 2-4 days at 70 degrees C or less for 15-20 days, press-filtering to obtain fermentation liquid, crushing wheat straw, carbonizing at 500-600 degrees C, heat-preserving for 2-3 hours, heating to 800-900 degrees C, heat-preserving for 1-2 hours, and cooling to obtain wheat straw carbonized powder, mixing fermentation liquid, coconut, and ferrous sulfate, heating to 55-65 degrees C, heat-preserving for 40-60 minutes, cooling to room temperature, adding calcium nitrate and potassium monohydrogen phosphate, stirring to obtain nutrient liquid, adding fresh urine, stirring uniformly, adding citric acid solution to adjust pH to 3.8-4.2, heat-concentrating to 8-10 times, mixing with wheat straw carbonized powder for absorption of urine, drying mixing all remaining materials, granulating, weighing, and packaging.