NOVELTY - A chicken manure and pig manure mixed fermentation fertilizer, is prepared by fermenting Ectomycorrhizal (EM) fungus (1-50 parts), straw powder or rice chaff (50-200 parts), calcium superphosphate (1-20 parts), peat soil (10-200 parts), chicken manure (50-888 parts) with water content (20%) and pig manure (50-888 parts) with water content of 20%.    USE - As chicken manure and pig manure mixed fermentation fertilizer (claimed).    ADVANTAGE - The nutrient contents of the chicken manure and the pig manure are complementary. The long-action of the chicken manure nutrient is combined with the quick-action of the pig manure nutrient, so in comparison with the single chicken manure or pig manure fermentation fertilizer nutrient, this chicken manure and pig manure mixed fermentation fertilizer is more comprehensive, more reasonable, more uniform and more suitable for absorption regulation. Under the premise of not lengthening the fermentation time, this preparation method of the chicken manure and pig manure mixed fermentation fertilizer makes the different materials completely ferment. In comparison with mixing after respectively fermenting chicken manure and pig manure, the preparation method reduces the fermentation field and equipment, shortens the fermentation time and saves the labor cost.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of a chicken manure and pig manure mixed fermentation fertilizer, involving: taking Ectomycorrhizal (EM) fungus (1-50 parts), straw powder or rice chaff (50-200 parts), calcium superphosphate (1-20 parts), peat soil (10-200 parts), chicken manure (50-888 parts) with water content (20%) and pig manure (50-888 parts) with water content (20%), mixing uniformly, regulating the water content at 50-65%, then piling into a fermentation tank, maintaining the height of the material at 0.5-1.2 m, controlling the temperature at 45 degrees C and fermenting for 1-2 days, then controlling the temperature at 60-70 degrees C and fermenting for 3-5 days; (2) a biological organic fertilizer, comprising the chicken manure and pig manure mixed fermentation fertilizer and organic fertilizer common auxiliary materials; and further comprises beneficial bacteria and central-microelement fertilizers; and (3) preparation of a biological organic fertilizer, involving: taking the chicken manure and pig manure mixed fermentation fertilizer (60-90 parts), adhesive (1-20 parts), the Bacillus subtilis (1-10 parts) with the preservation serial number of (CGMCC No.6190) and central-microelement fertilizers (1-20 parts), mixing uniformly, granulating and drying to obtain the finished product.