NOVELTY - Humic acid bio-organic fertilizer comprises weathered coal, dried sheep manure, chemical fertilizer, bentonite, water retention agent and mixed microbial agent per kg of aqueous humic acid bio-organic fertilizer spray. The chemical fertilizer comprises urea, diammonium phosphate and potassium sulfate. The mixed microbial agent comprises Sporolactobacillus, Bacillus megaterium and Bacillus licheniformis. The water retention agent comprises polyacrylamide, sodium alginate and agar.    USE - Used as humic acid bio-organic fertilizer.    ADVANTAGE - The fertilizer has water retention property (claimed); comprises humic acid and functional micro-organism, which improves soil, increases crop yield and crop quality and enhances crop drought resistance.    DETAILED DESCRIPTION - Humic acid bio-organic fertilizer comprises 22-40 wt.% weathered coal, 50-60 wt.% dried sheep manure, 4-5 wt.% chemical fertilizer, 5-10 wt.% bentonite, 1-3 wt.% water retention agent and 30-50 ml mixed microbial agent per 1 kg of aqueous humic acid bio-organic fertilizer spray. The chemical fertilizer comprises 2:1:1 mass ratio of urea, diammonium phosphate and potassium sulfate. The mixed microbial agent comprises 1:1:1 mass ratio of Sporolactobacillus, Bacillus megaterium and Bacillus licheniformis. The water retention agent comprises 6:3:1 mass ratio of polyacrylamide, sodium alginate and agar. An INDEPENDENT CLAIM is also included for preparation of humic acid bio-organic fertilizer comprising (i) taking weathered coal, urea, diammonium phosphate and potassium sulfate as chemical fertilizer, crushing in a grinder, adding dried sheep manure, uniformly mixing, adjusting moisture content to 60%, carrying out compositing fermentation for 30-40 days and completely decomposing, (ii) grinding through 80 mesh sieve to a obtain powder, adding bentonite, polyacrylamide, sodium alginate and agar as water retention agent, uniformly mixing, granulating, drying at 120-210 degrees C for maintaining moisture content at 8% and cooling, spraying mixed microbial agent (per kg), absorbing, drying at 55-60 degrees C for maintaining moisture content at 8% and packaging.