NOVELTY - Producing amino acid chelated trace element-containing organic-inorganic complex fertilizer, comprises crushing e.g. dried mixture of pig and cattle manure, mixture of peanut straw and oilseed rape straw and mixture of cottonseed and rapeseed into powder and fermenting in fermentation tank to obtain organic fertilizer, crushing e.g. monoammonium phosphate, potassium sulfate and amino acid chelated calcium into powder, adding into mixing tank, adding organic fertilizer into the mixing tank and uniformly blending, granulating the mixture via granulator, and then passing into a dryer for drying.    USE - The method is useful for producing organic-inorganic complex fertilizer (claimed).    ADVANTAGE - The fertilizer has a synergistic effect of organic and inorganic nutrients.    DETAILED DESCRIPTION - Producing amino acid chelated trace element-containing organic-inorganic complex fertilizer, comprises: (i) adding 29-31 wt.% dried mixture of pig and cattle manure, 10-12 wt.% mixture of peanut straw and oilseed rape straw, 6 wt.% mixture of cottonseed and rapeseed, 6 wt.% mixture of rice hull and wheat bran, 10 wt.% dried pollution-free river mud, 4 wt.% plant ash, 6 wt.% distillers grains and 5 wt.% biogas residue into a crusher and crushing into powder to obtain organic material, feeding the organic material into a fermentation tank, adding 1.5 wt.% organic fertilizer fermenting agent and proper amount of water, stirring uniformly, sealing and fermenting for 20-25 days, adding 1.5 wt.% sterilizing deodorant and stirring to remove the odor, opening the tank and naturally drying until moisture content reduces to less than 25% to obtain organic fertilizer; and (ii) adding 6 wt.% urea, 7 wt.% monoammonium phosphate, 5 wt.% potassium sulfate, 0.3 wt.% amino acid chelated calcium, 0.1 wt.% amino acid chelated copper, 0.3 wt.% amino acid chelated iron, 0.1 wt.% amino acid chelated manganese, 0.1 wt.% amino acid chelated zinc and 0.1 wt.% ammonium molybdate into the crusher and crushing into powder, adding the inorganic powder into mixing tank, adding organic fertilizer into the mixing tank and uniformly blending the materials; and (iii) granulating the mixture via granulator, and then passing into a dryer for drying.