NOVELTY - Composite microbial inoculum organic multielement compound fertilizer comprises microbial inoculum, organic component and inorganic fertilizer, where the microbial inoculum is a composite microbial inoculum which comprises the following three types of microbial inocula: resource type microbial inoculum, environment-friendly microbial inoculum, and antibiotic microbial inoculum.    USE - The composite microbial inoculum organic multielement compound fertilizer is useful in agricultural production for providing disease resistance, stimulating growth of crops, and for increasing effective nutrient content.    ADVANTAGE - The fertilizer not only can aim the various nutrient elements good crop growth and balancing fertilizing, but also can provide disease resistance, stimulates growth of crops, at the same time can increase the effective nutrient content in the soil that can provide good environment for the growth of crops, can improve soil, and can reduce the pollution of the environment.    DETAILED DESCRIPTION - Composite microbial inoculum organic multielement compound fertilizer comprises microbial inoculum, organic component and inorganic fertilizer, where the microbial inoculum is a composite microbial inoculum which comprises the following three types of microbial inocula: resource type microbial inoculum, which contains Bacillus megatherium (ACCC10008, 10009, 10010, 10011 and AS1.217), Thiobacillus thiooxidans (AS1.1479), Bacillus mucilaginosus (ACCC10012, 10013 and 10014) and Bacillus circulans (AS1.383, 1.553 and 1.554); environment-friendly microbial inoculum, which contains Arthrobacter (AS1.8) and Alcaligenes faecalis (AS1.448. AS1.767, AS1.768, and AS1.924); and antibiotic microbial inoculum, which contains Streptomyces micuoflavus (ACCC40027, AS4.399, AS4.407 and AS4.412) and Streptomyces jingyangensis (ACCC40021, ACCC40022 and ACCC40023); the organic component is one or more of cereal crop straw, subsidiary agricultural product dreg, sugar mill bagasse, bran coat, municipal and rural domestic waste, and livestock and poultry dung; the inorganic fertilizer is one or more of nitrogen fertilizer, phosphate fertilizer, potash fertilizer and medium/micro-nutrient element fertilizer; and the weight proportion of microbial inoculum to organic constituent to inorganic fertilizer is (5-25):(18-28):(47-77). An NDEPENDENT CLAIM is a method for preparing composite microbial inoculum organic multielement compound fertilizer, comprising: (a) preparing Bacillus megatherium (ACCC10008, 10009, 10010, 10011 and AS1.217), Thiobacillus thiooxidans (AS1.1479), Bacillus mucilaginosus (ACCC10012, 10013 and 10014) and Bacillus circulans (AS1.383, 1.553 and 1.554) solid culture according to the sequence of slant training, level 2 seed expand training, seed tank level 3 training and solid adsorption production training, and then mixing with the crushed and sterilized adsorbent to manufacture the bacterium agent; (b) preparing Arthrobacter (AS1.8) and Alcaligenes faecalis (AS1.448. AS1.767, AS1.768, and AS1.924) solid culture according to the sequence of slant training, level 2 seed expand training, seed tank level 3 training and solid adsorption production training, and then mixing with the crushed and sterilized adsorbent to manufacture the bacterium agent; (c) preparingStreptomyces micuoflavus (ACCC40027, AS4.399, AS4.407 and AS4.412) and Streptomyces jingyangensis (ACCC40021, ACCC40022 and ACCC40023) solid culture according to the sequence of level 1 strains preparation, level 2 culture shake flask training, level 3 seed tank training, level 4 fermentation tank training and solid adsorption production training, and then mixing with the crushed and sterilized adsorbent to manufacture the bacterium agent; and (d) mixing fully the bacterium agent (1), bacterium agent (2) and bacterium agent (3) to get the compound bacterium agent which mixes with the organic component to get the organic material containing the bacterium agent; in addition, taking nitrogenous fertilizer, phosphate fertilizer and potash fertilizer to mixing fully with one or more of the fertilizers selected from calcium, magnesium, sulfur, ferrum, copper, zinc, manganese, molybdenum, chlorine or boron fertilizer to get the inorganic fertilizer; before using, mixing fully the organic material containing the bacterium agent with the inorganic fertilizer to get the compound bacterium agent organic multi-element compound fertilizer powder, then inputting the powder into the granulator for pelleting, then drying at the low temperature to form the compound bacterium agent organic multi-element compound fertilizer; or respectively entering the organic material containing the bacterium agent into the organic granulator for pelleting, performing inorganic granulation to the inorganic multi-element fertilizer, drying at the high temperature, cooling and the mixing with the former to form the compound bacterium agent organic multi-element compound fertilizer.