TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Fertilizer: In the composite microbial inoculum organic multielement compound fertilizer, in the bacterium agent, the contents of the strains of Bacillus megatherium, Thioobacillus thiooxidans, Bacillus mucilaginosus, Bacillus circulans, Arthrobacter sp., Alcaligenes faecalis, Streptomyces microflavus and Streptomyces jingyangensis are effective live bacteria number which is more than or equal to 2x108 per gram. The bacterium agent comprises Bacillus megatherium (1.25), Thioobacillus thiooxidans (9-25), Bacillus mucilaginosus (1-25), Bacillus circulans (21-25), Arthrobacter sp. (9-49), Alcaligenes faecalis (9-49), Streptomyces microflavus (1-49) and Streptomyces jingyangensis (1-49). The nitrogenous fertilizer is one or more selected from ammonium sulfate, ammonium nitrate, ammonium chloride, urea and nitrogenous fertilizer of any other containing nitrogen fertilizer. The phosphate fertilizer is one or more selected from monoammonium phosphate or diammonium phosphate, calcium superphosphate, calcium triple superphosphate, potassium dihydrogen phosphate, calcium magnesium phosphate, nitric phosphate and phosphate fertilizer of any other containing phosphorus fertilizer. The potash fertilizer is one or more selected from potassium chloride, potassium sulfate, potassium silicate, potassium dihydrogen phosphate, and potassium metaphosphate and potash fertilizer of any other containing potassic fertilizer. Preferably, the middle trace nutrient element fertilizer is one or more selected from the middle trace nutrient element fertilizer of calcium, magnesium, sulfur, iron, copper, zinc, manganese, molybdenum, chlorine or boron fertilizer; the calcium fertilizer is one or more selected from calcium magnesium phosphate, calcium superphosphate, quicklime, hydrated lime, ground phosphate rock and any other containing calcium fertilizer; the magnesium fertilizer is one or more selected from magnesium sulfate, magnesium chloride, magnesium carbonate, magnesium hydrogen phosphate and any other containing magnesium fertilizer; the sulfur fertilizer is one or more selected from sulfur powder, ammonium sulfate and any other containing sulfur fertilizer; the iron fertilizer is one or multiple selected from ferrous sulfate, ferrous ammonium phosphate and any other containing iron fertilizer; the copper fertilizer is one or multiple selected from copper sulfate, copper chloride and any other containing copper fertilizer; the zinc fertilizer is one or more selected from zinc sulfate, zinc chloride and any other containing zinc fertilizer; the manganese fertilizer is one or more selected from manganese sulfate, manganese chloride and any other containing manganese fertilizer; the molybdenum fertilizer is one or more selected from ammonium molybdate, sodium molybdate and any other containing molybdenum fertilizer; the chloride fertilizer is one or more selected from potassium chloride and any other containing chloride fertilizer; and the boric fertilizer is one or more selected from boric acid, borax and any other containing boric fertilizer. The organic component is one or more selected from corn, wheat, rice, sorghum, soy bean, sesame, cotton, straw of peanut, grass carbon, urban garbage, manioc waste, sugar mill filter mud, bagasse, wine or Vinegar residue, cavings, peanut shell powder, soybean oil cake, peanut oil cake, sesame oil cake, poultry excrement or the organic component of puffed things of the above waste. The fertilizer according to the weight contains the total weight of nitrogen, phosphorus and potassium for 25-30 percent, where 10-15% nitrogen, 5-10% phosphorus and 5-15% potassium; the fertilizer contains 0-8% calcium, 0-3% magnesium, 0-5% sulfur, 0-0.4% ferrum, 0-0.05% copper, 0-0.4% zinc, 0-0.7% manganese, 0-0.07% molybdenum, 0-025% boron and 0-0.13% chlorine. ACTIVITY - Fertilizer; Plant Protectant.