NOVELTY - Preparing ecological organic fertilizer comprises cutting straw using a chaff cutter into size of 2-3 cm, wetting the chopped straw by adding 50-65 wt.% of water, regulating nitrogen (N), phosphorus (P) and potassium (K) in the straw, adjusting the pH value of the straw, mixing the biologically active agent with the straw material, carrying out high pressure mixing, introducing the straw material into a fermentation tank, crushing the fermented product into pieces by pressing, fermenting the pieces to break straw fibers hormone and other substances and then granulating and sieving.    USE - The method is useful for preparing ecological organic fertilizer (claimed).    ADVANTAGE - The method is capable of preparing ecological organic fertilizer with high resource utilization rate and high production efficiency.    DETAILED DESCRIPTION - Preparing ecological organic fertilizer comprises (1) cutting straw using a chaff cutter into size of 2-3 cm, wetting the chopped straw by adding 50-65 wt.% of water, regulating nitrogen (N), phosphorus (P) and potassium (K) in the straw by adding 46% of urea, 5% of N, 12.5% of P and 4% of K with the straw according to the ratio of 3:1, adjusting the pH value of the straw using ash material to 6.5-4, mixing the biologically active agent with the straw material to decompose the straw substances into cellulose, carrying out high pressure mixing, introducing the straw material into a fermentation tank at 85-95 degrees C, crushing the fermented product into pieces with size of 1-2 cm by pressing, fermenting the pieces at 85-95 degrees C for the second time to break straw fibers hormone and other substances and then granulating and sieving, (2) enhance the quality of the preparation of fertilizer, mixing manure of cow, chicken, pig and sheep with the fertilizer and then drying until the moisture content is 50-60%, adding ash with the fertilized to adjust the pH value to 6.5-8, adding bioactive agents and then fermenting under high-pressure for 3-5 days, drying the fermented product until the moisture content is 5-8%, crushing and granulating the obtained product and (3) improving the quality of the fertilizer powder and then weighing and packing. An INDEPENDENT CLAIM is included for an ecological organic straw fertilizer comprising 5-10 pts. wt. of nitrogen, 3-8 pts. wt. of phosphorus pentoxide, 3-5 pts. wt. of potassium oxide and 40-50 pts. wt. of straw organic matter, 20-30 pts. wt. of fertilizer enhancing substance and 2-5 pts. wt. of bioactivator.