NOVELTY - Bio fertilizer comprises soluble chitosan, peat soil, molasses, palygorskite powder, cortex dictamni, ferrous sulfate, urea, chicken manure, wooden chip, peat, vinegar dregs, silicate, wollastonite and auxiliary agent. The auxiliary agent comprises iron ore powder, fresh pasture, rotten fruit, EDTA chelated copper, EDTA chelated magnesium, EDTA chelated calcium, EDTA chelated zinc, methyl methacrylate, dicyandiamide, diatomite and fresh konjac.    USE - As micro-element-rich silicate bacterium fertilizer (claimed).    ADVANTAGE - The micro-element-silicate bacterium fertilizer is rich in nutrients, iron, copper and manganese, enhances soil permeability, and improves water retention capacity of soil.    DETAILED DESCRIPTION - Bio fertilizer comprises 2-4 pts. wt. soluble chitosan, 6-8 pts. wt. peat soil, 10-15 pts. wt. molasses, 6-8 pts. wt. palygorskite powder, 9-11 pts. wt. cortex dictamni, 3-4 pts. wt. ferrous sulfate, 6-9 pts. wt. urea, 120-150 pts. wt. chicken manure, 19-21 pts. wt. wooden chip, 38-42 pts. wt. peat, 17-23 pts. wt. vinegar dregs, 2-4 pts. wt. silicate, 4-7 pts. wt. wollastonite and 5-7 pts. wt. auxiliary agent. The auxiliary agent comprises 4-6 pts. wt. iron ore powder, 8-10 pts. wt. fresh pasture, 14-18 pts. wt. rotten fruit, 3-5 pts. wt. EDTA chelated copper, 3-5 pts. wt. EDTA chelated magnesium, 3-5 pts. wt. EDTA chelated calcium, 3-5 pts. wt. EDTA chelated zinc, 2-3 pts. wt. methyl methacrylate, 0.5-1.5 pts. wt. dicyandiamide, 5-8 pts. wt. diatomite and 6-9 pts. wt. fresh konjac. The auxiliary agent is prepared by mixing fresh pasture, rotten fruit and fresh konjac with water, washing mixed materials, placing washed materials in mortar and grinding for 30-50 minutes, collecting the filtrate and residue, grinding diatomite into powder, mixing EDTA chelated copper, EDTA chelated magnesium, EDTA chelated calcium, EDTA chelated zinc, iron ore powder and obtained residue, stirring mixture and granulating into particle diameter of 2-4 mm, uniformly coating the obtained filtrate on the surface of granules, finally mixing methyl methacrylate and dicyandiamide and coating the mixture on the surface of coated granule, drying and cooling coated granules. An INDEPENDENT CLAIM is included for method for preparing bio fertilizer, which involves (a) placing chicken manure, peat, molasses water and vinegar residue to fermentation tank, adding water and 0.5% effective microorganism and performing anaerobic fermentation for 7-13 days, and maintaining moisture content of 35%, (b) adding wooden chip, peat, cortex dictamni, urea and soluble chitosan to fermentation tank, adding 0.3% Bacillus subtilis and performing anaerobic fermentation at 50-65 degrees C for 60-72 hours and maintaining moisture content of 45%, adding 0.2% Aspergillus niger after fermentation, and continuously fermenting for 18-22 days, and drying the fermented materials, (c) sterilizing 1.05 kg/cm2 wollastonite for 20-30 minutes and grinding into powder, and (d) mixing dried fermented materials obtained in step (b) and powder obtained in step (c) and above-mentioned remaining materials, adding 0.8% binder to mixture and stirring uniformly into granules having particle diameter of 8-12 mm and drying product under low-temperature.