NOVELTY - A composite fungicide comprises 10-40 parts of Brevibacillus brevis zymophyte liquid, 10-40 parts of Pseudomonas fluorescens zymophyte liquid, and 15-45 parts of sugarcane thermophilic Actinomyces zymophyte liquid, where the number of the bacterial in the zymophyte liquid every ml is 400-700 millions.    USE - The composite fungicide is used for composting the pig manure (claimed).    ADVANTAGE - The composite fungicide can accelerate degradation of organic matter and decreases the nitrogen converted to the gaseous form from the organic nitrogen so as to show stronger ammonia-inhibiting ability and degrading ability during the fermentation of pig manure compost. The composite fungicide quickens the decomposing speed of pig manure and releases less ammonia.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is a method for preparing the composite fungicide comprises (a) slant culture: the separated three bacteria strains are respectively inoculated to the agar-agar nutrient medium, the B. brevis and the P. fluorescens use the beef extract nutrient medium; the sugarcane thermophilic Actinomyces use the improved No.1 Gause nutrient medium for being cultivated at 45-50 degrees C for 1-4 days; (b) culture of primary seed: the HIV strains obtained in step (a) are respectively inoculated to the corresponding liquid nutrient medium of each bacteria under the germ-free condition, and cultivated in the 100-200 rounds per minute (rpm) rocking bed at 45-50 degrees C for 1-4 days so as to prepare the primary seed; (c) culture of secondary seed: the primary seed is respectively inoculated to the fermenting tank, sterilized at 120-125 degrees C for 25-30 minutes, and cultivated at 45-50 degrees C for 1-4 days; when the number of the bacteria in the fermenting liquid every mL is 400-700 million, the secondary seed is prepared; the pH value of the fermenting liquid in the fermenting tank is 7.0-7.3; the fermenting liquid comprises water, soybean milk, starch, glucose/cane sugar, calcium carbonate and ferric trichloride; the weight ratio of each component in the fermenting liquid is as follows: water to soybean for preparing soya-bean milk to starch to glucose/cane sugar to calcium carbonate to ferric trichloride is 1000:6.5:4.1:0.1:0.01; and (d) mixed fermenting culture: according to the proportion, the secondary seed in step (c) is mixed uniformly and inoculated to the mixed fermenting tank added with wheat bran for being cultivated at room temperature for 2-4 days so as to obtain the composite fungicide; and the volume of the secondary seed and the wheat bran is 1:15 to 1:20.