NOVELTY - Multi-element composite microbial fertilizer preparation involves selecting and mixing vinasse, fungal residue, rice hull, chitosan, turves, sawdust and plant ash, and then passing them through 0.1-2cm of sieve to obtain sample A. Chroococcus, Eunotia lunaris, Chlamydomonas sajao, Anabaena azotica and Chlorella vulgaris are fermented and the fermented algae (3-12 times) is absorbed by the sample. All absorbed algae are mixed in a ratio of 5-55:0-30:0-35:0-35:10-50 to obtain sample B.    USE - Method for preparing multi-element composite microbial fertilizer (claimed) used for preventing physiological disease of plant caused by iron deficiency.    ADVANTAGE - The method enables to prepare the multi-element composite microbial fertilizer that increase nutrient supply of manure, improve physiochemical property of manure, accelerate growth of plant and improve yield and quality of crop.    DETAILED DESCRIPTION - Multi-element composite microbial fertilizer preparation involves selecting and mixing vinasse, fungal residue, rice hull, chitosan, turves, sawdust and plant ash, and then passing them through 0.1-2cm of sieve to obtain sample A. Chroococcus, Eunotia lunaris, Chlamydomonas sajao, Anabaena azotica and Chlorella vulgaris are fermented and the fermented algae (3-12 times) is absorbed by the sample. All absorbed algae are mixed in a ratio of 5-55:0-30:0-35:0-35:10-50 to obtain sample B. Calcium carbonate, turves, lignite, zeolite, vermiculite, fly ash, bentonite and kieselguhr are uniformly mixed and then passed through 0.1-2cm sieve to obtain sample C. Bacillus megaterium, Bacillus subtilis, Rhodopseudomonas palustris, Streptomyces jingyangensis and Bacillus mucilaginosus are fermented and then the fermented bacteria (2-10 times) are absorbed by sample C. All absorbed bacteria are uniformly mixed in a weight ratio of 10-50:0-35:0-30:0-25:10-55 to obtain sample D. Lysine, methionine, glycine and threonine (5-35%) are mixed and dissolved with 10-35% of water, where 0.5-5.5% of ethanol are added to the mixture. The mixture is reacted at 20-65 degrees C for 0.5-3.5 hours, where 0.15% of citric acid is added into reaction kettle and then 30-65% of ferric sulfate is added to the reaction kettle to obtain sample E. The mixture is processed at 70-115 degrees C for 0.5-6 hours and then pressurized at 2-5kg/cm2 after cooling the mixture at room temperature. The product is kept for 20-36 hours and then cured and dried. The finished product is obtained by mixing 15-55% of sample B, 35-65% of sample D, 5-20% of sample E and 0-8% of manure of bird.