NOVELTY - Heat preserving liquid fertilizer plastic film comprises 20-22 pts. wt. rice husk ash, 6-9 pts. wt. coffee bean, 25-28 pts. wt. pine powder, 3-4 pts. wt. composite microorganism inoculants, 19-21 pts. wt. modified starch solution, 55-60 pts. wt. chicken manure, 17-23 pts. wt. weathered coal and balanced amount of water. Composite microorganism inoculants comprise silicate compound microbial inoculum, Bacillus subtilis and photosynthetic bacteria microbial inoculums in ratio of 2:2:1.    USE - Heat preserving liquid fertilizer plastic film used for corn (claimed).    ADVANTAGE - The heat preserving liquid fertilizer plastic film absorbs increased soil temperature, optimizes growing environment of corn, increases soil fertility, and improves soil micro-ecological environment.    DETAILED DESCRIPTION - Heat preserving liquid fertilizer plastic film comprises 20-22 pts. wt. rice husk ash, 6-9 pts. wt. coffee bean, 25-28 pts. wt. pine powder, 3-4 pts. wt. composite microorganism inoculants, 19-21 pts. wt. modified starch solution, 55-60 pts. wt. chicken manure, 17-23 pts. wt. weathered coal and balanced amount of water. Composite microorganism inoculants comprise silicate compound microbial inoculum, Bacillus subtilis and photosynthetic bacteria microbial inoculums in ratio of 2:2:1. Modified starch solution comprises 45-55 pts. wt. potato, 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. Modified starch solution is prepared by dissolving potato in water (2 times) and heated at 70-90 degrees C for 30-60 minutes to obtain paste. Potassium permanganate solution is mixed with the paste to carry out oxidation process for 50-70 minutes, and then acrylic acid and sodium hydroxide solution are mixed. N,N'-methylenebisacrylamide is mixed in the mixture for 20-30 minutes, and calcium acetate is added and stirred uniformly at 50-60 degrees C. Ferrous sulfate is mixed in the product for 15 minutes and stirred uniformly to obtain chelated product. Zinc sulfate is added in chelated product for 15 minutes and manganese sulfate is mixed at 60-80 degrees C for 20-30 minutes. An INDEPENDENT CLAIM is included for a method for preparing heat preserving liquid fertilizer plastic film, which involves:    (A) fermenting chicken manure, pine powder, chaff rice husk ash and weathered coal with water in a fermentation pool for 3-4 weeks to obtain fermentation liquid;    (B) drying coffee beans at 50-70 degrees C and grinding into fine powder, adding little water and heating at70-80 degrees C for 10-20 minutes, and then cooling at 30 degrees C to obtain coffee liquid;    (C) adding microbial inoculums in coffee liquid and filtering to obtain filter liquor and heating at 40-50 degrees C with air blower and drying and grinding; and    (D) mixing remaining components and stirring uniformly, drying in furnace at 100-110 degrees C for 20-30 minutes, and then crushing through 200 meshes sieve to obtain final product.