NOVELTY - Organic fertilizer is prepared by fermenting (in parts weight): xylitol residue (40-55), tobacco residue (10-25), peat (10-20), urea (0.5-1), ammonium nitrate (0.5-1), calcium magnesium phosphate fertilizer (2-5), potassium sulfate (0-1), potassium chloride (0.5-1) and microorganism inoculants (10-20).    USE - As organic fertilizer.    ADVANTAGE - The organic fertilizer can be produced by rapidly increasing the temperature and by stably decomposing xylitol residue. The method recycles large amount of industrial waste and thus reduces environmental pollution.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing the organic fertilizer, which involves (a) mixing (in parts weight): mixing horse dung (8-12) with cake residue (5-10) and cottonseed hull (75-85), adjusting moisture content of the mixture to 60-65% and pH value to 7-7.5, covering the mixture with plastic film, fermenting the mixture for 3-5 days, increasing the temperature of piled material to 50 degrees C and maintaining for 3-5 days, stirring and fermenting the mixture for 3-5 days to obtain grade one solid microorganism inoculant, (b) mixing grade one microorganism inoculant (15-25) with xylitol residue (60-80), urea (0.5-1.5), calcium superphosphate (2-4) and potassium chloride (1-2), and fermenting the mixture to obtain grade two microorganism inoculant, and (c) mixing the above-mentioned raw materials uniformly, adjusting moisture content of the mixture to 60-65 wt.% and pH value to 7-7.5, piling up the mixture to a ladder-shaped pile to a height of 1.5-1.8 m, drilling 10-15 holes/m2 from top to bottom, covering the holes with plastic film, fermenting the mixture, increasing temperature of the piled material to 50 degrees C and fermenting for 5-7 days, stirring and fermenting the mixture once for every 5-7 days, fermenting the mixture for 40-45 days, drying or air-drying the fermented organic fertilizer until the moisture content is lower than 25 wt.%, and sieving the product to obtain powder or spraying 2 wt.% of carboxymethyl cellulose aqueous solution for pelleting to obtain organic fertilizer.