NOVELTY - Bio-organic fertilizer comprises 52-74 pts. wt. manure, 24-36 pts. wt. bran powder, 36-48 pts. wt. sugar mill sludge, 18-26 pts. wt. oil shale ash, 15-27 pts. wt. edible mushroom waste, 10-15 pts. wt. flos sophorae meal, 17-29 pts. wt. milk residue, 12-18 pts. wt. brewer grain, 9-16 pts. wt. egg shell powder, 16-24 pts. wt. rice water, 13-19 pts. wt. expired yogurt, 10-15 pts. wt. stove subsoil, 16-22 pts. wt. weathered coal, 8-12 pts. wt. bone powder, 3-5 pts. wt. humic acid, 15-20 pts. wt. composite stone granule and effective microorganism (EM) probiotic.    USE - Bio-organic fertilizer used for potato (claimed).    ADVANTAGE - The fertilizer has high efficiency and long effect, and is easy to absorb. It increases yield and economic efficiency, improves quality and soil structure, removes heavy metals and other hazardous substances, adjusts soil pH, enhances soil fertility and water conservation, reproduces soil bacteria, destroys harmful bacteria, enhances potato resistance, reduces incidence of potato pests and diseases and cultivation cost.    DETAILED DESCRIPTION - Bio-organic fertilizer comprises 52-74 pts. wt. manure, 24-36 pts. wt. bran powder, 36-48 pts. wt. sugar mill sludge, 18-26 pts. wt. oil shale ash, 15-27 pts. wt. edible mushroom waste, 10-15 pts. wt. flos sophorae meal, 17-29 pts. wt. milk residue, 12-18 pts. wt. brewer grain, 9-16 pts. wt. egg shell powder, 16-24 pts. wt. rice water, 13-19 pts. wt. expired yogurt, 10-15 pts. wt. stove subsoil, 16-22 pts. wt. weathered coal, 8-12 pts. wt. bone powder, 3-5 pts. wt. humic acid, 15-20 pts. wt. composite stone granule and effective microorganism (EM) probiotic. The composite stone grain is prepared by taking 15-25 pts. wt. tourmaline, 12-18 pts. wt. micrite, 8-14 pts. wt. allophane, 16-28 pts. wt. natural zeolite, 5-10 pts. wt. loess stone, 10-15 pts. wt. medical stone, 6-12 pts. wt. pitchstone, 14-22 pts. wt. hokutolite and 20-30 pts. wt. diatomite; mixing natural zeolite, pitchstone, loess stone and medical stone mixed, adding 1 mol/L hydrochloric acid solution in solid-liquid ratio of 1:10-15, heating in water bath to 60-70 degrees C, stirring for 2-3 hours, filtering, washing with distilled water to neutralize, drying, calcining at 480-560 degrees C for 4-6 hours, crushing and grinding through 80-120 mesh sieve; mixing tourmaline, micrite, allophane and hokutolite, grinding through 100-150 mesh, adding water to make 45-55% suspension, stirring, adding 3-4 wt.% sodium dodecylbenzenesulfonate and 2-3 wt.% cetyl trimethyl ammonium bromide, dispersing with 2000-3000 revolutions/minute (rpm) speed for 15-20 minutes and spray-drying into powder; and mixing powder obtained in first and second step, adding celite, stirring, wet granulating to 0.5-0.8 mm, sintering at 1080-1120 degrees C for 1-2 hours and cooling to room temperature. An INDEPENDENT CLAIM is included for preparation of bio-organic fertilizer comprising mixing manure, bran powder, flos sophorae meal, oil shale ash and brewer grain, adding 150 times of 2-4% EM probiotic, stirring, adding water to control moisture control at 45-50%, sealing and fermenting for 4-8 days at 50-60 degrees C; adding sugar mill sludge, edible mushrooms waste, milk residue, egg shell powder, rice water and expired yogurt, stirring, sealing and fermenting for 6-12 days at 45-55 degrees C; and adding remaining raw materials and stirring.