NOVELTY - Diammonium multi-microbial bio-organic refined efficient fertilizer comprises an organic waste material, potassium chloride, humic acid, trace elements, microorganism, urea, diammonium phosphate and ammonium chloride. The organic waste material comprises rotten husk, oil cake, crop straw, Chinese herbal medicine residue, bamboo-wood fiber, rural solid waste and/or plant waste materials. The trace elements comprise calcium, magnesium, sulfur, iron, zinc, boron, manganese, copper, chlorine, molybdenum and/or nickel. The microorganism include e.g. Azotobacter and Saccharomyces.    USE - Used as diammonium multi-microbial bio-organic refined efficient fertilizer.    ADVANTAGE - The fertilizer: utilizes many microorganisms which provides mutulalistic symbiotic environment; exhibits strong biological activity and high fertilizing effect; has slow release controlling effect; fertilizes the land; improves the quality of the agricultural products; enhances the capability of resisting plant diseases, insect pests and drought; inhibits the adsorption of the crops to the heavy metal and pesticide; purifies and repairs the soil; and suitable for all crops and soil.    DETAILED DESCRIPTION - Diammonium multi-microbial bio-organic refined efficient fertilizer comprises (in parts by wt.): an organic waste material (44-54), potassium chloride (10-15), humic acid (10-15), trace elements (0.4-0.6), microorganism (0.4-0.6), urea (5-10), diammonium phosphate (10-15) and ammonium chloride (5-10). The organic waste material comprises rotten husk, oil cake, crop straw, Chinese herbal medicine residue, bamboo-wood fiber, rural solid waste and/or plant waste materials, in a similar or different weight ratio. The trace elements comprise calcium, magnesium, sulfur, iron, zinc, boron, manganese, copper, chlorine, molybdenum and/or nickel. The microorganism comprises nitrogen-fixing bacteria, Azotobacter, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, Bacillus, Actinomyces 5406 and/or Saccharomyces. An INDEPENDENT CLAIM is also included for preparing the diammonium multi-microbial bio-organic refined efficient fertilizer, comprising: culturing the microorganism by test tube culturing and fermenting the culture to prepare microorganism raw material, crushing and sieving the organic waste material until the grain diameter is 0.18 mm, mixing the organic material waste material, microorganism, potassium chloride, urea, diammonium phosphate, ammonium chloride, humic acid and trace elements in the given ratio and manufacturing by the regular fertilizer production method, granulating and packing to obtain the product.