NOVELTY - High strength liquid corn fertilizer in plastic film includes sawdust, composite microbial inoculants, modified starch solution, corn protein powder, oyster shell powder, coffee bean, superfine mica powder, and water. The ratio of composite microbial inoculants which comprises silicate bacteria, Bacillus subtilis and photosynthetic bacteria is 2:1:1. The modified starch solution comprises potato starch, calcium acetate, potassium permanganate solution, acrylic acid, sodium hydroxide, N,N-methylenebisacrylamide, ferrous sulfate, zinc sulfate, and manganese sulfate.    USE - High strength liquid corn fertilizer in plastic film used for increasing corn yield.    ADVANTAGE - The fertilizer improves flexibility and mechanical strength of film to support natural degradation, and increases soil nutrient content.    DETAILED DESCRIPTION - High strength liquid corn fertilizer in plastic film comprises 32-35 pts. wt. sawdust, 3-5 pts. wt. composite microbial inoculants, 13-17 pts. wt. modified starch solution, 33-36 pts. wt. corn protein powder, 18-20 pts. wt. oyster shell powder, 9-10 pts. wt. coffee bean, 9-11 pts. wt. superfine mica powder, and water. The ratio of composite microbial inoculants which comprises silicate bacteria, Bacillus subtilis and photosynthetic bacteria is 2:1:1. The modified starch solution comprises 45-55 pts. wt. potato starch, 2-4 pts. wt. calcium acetate, 2-3 pts. wt. potassium permanganate solution, 15-20 pts. wt. acrylic acid, 3-4 pts. wt. sodium hydroxide, 0.1-0.3 pts. wt. N,N-methylenebisacrylamide, 8-10 pts. wt. ferrous sulfate, 6-8 pts. wt. zinc sulfate, and 7-9 pts. wt. manganese sulfate. The modified starch solution is prepared by dissolving potato starch into 2 times by wt. water, heating at 70-90 degrees C, gelatinizing for 30-60 minutes, carrying out oxidation reaction by adding potassium permanganate solution, stirring for 50-70 minutes, adding acrylic acid and sodium hydroxide, carrying out crosslinking reaction by adding N,N-methylenebisacrylamide for 20-30 minutes, adding calcium acetate, uniformly stirring, heating at 50-60 degrees C, adding ferrous sulfate, chelating for 15 minutes, uniformly stirring, adding zinc sulfate, chelating for 15 minutes, adding manganese sulfate, heating at 60-80 degrees C, and chelating for 20-30 minutes. An INDEPENDENT CLAIM is included for preparation of high strength liquid corn fertilizer in plastic film comprising mixing corn protein powder and sawdust into fermentation tank, adding adequate water, maintaining moisture content of 58-62%, fermenting 3-4 weeks, taking out fermented material, pressing to obtain liquid fermentation; drying coffee beans at 50-70 degrees C, crushing into fine powders, adding small amount of water, heating at 75-85 degrees C, stirring for 10-15 minutes, cooling to 30 degrees C, adding silicate bacteria, Bacillus subtilis and photosynthetic bacteria into coffee solution, uniformly stirring, filtering, drying filtrate using air blower at 45-55 degrees C, crushing to obtain composite microbial inoculants in soluble coffee powder, setting aside; mixing liquid fermentation with modified starch solution, uniformly stirring, drying into furnace at 100-130 degrees C for 25-35 minutes, cooling, screening through 200 mesh sieve, setting aside; and mixing step 2 and 3, adding superfine mica powder and remaining raw materials, drying at 60-80 degrees C, weighing, and packaging. The mass ratio of powder dissolved in water is 1:9 particularly diluting at 18-22 kg/acre which is sprayed into soil surface.