TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preparation (claimed): Preparing the compound microbial viable bacteria preparation comprises performing amplified liquid culture to each of above bacteria through normal method; then mixing the bacteria according to the needed ratio; performing solid fermentation to the bacteria, then drying and crushing them into powders to obtain the compound microbial viable bacteria preparation. It comprises the following specific steps: (a) performing amplified liquid culture to each of above bacteria separately: after an incline activation, inoculating Pediococcus to a liquid culture medium to culture for 44 to 52 hours at 33 to 35 degrees C; after an incline activation, inoculating microzyme to a liquid culture medium to culture for 44 to 52 hours at 26 to 28 degrees C; and after an incline activation, inoculating Bacillus to a liquid culture medium to culture for 44 to 52 hours at 26 to 28 degrees C; then counting the viable bacteria, checking the amount of Pediococcus, microzyme, and Bacillus, and subsequently mixing the bacteria liquids according to the needed ratio; and (b) performing a solid fermentation to the mixture for 44 to 52 hours at 28 to 35 degrees C; then drying the mixture at 35 to 44 degrees C, crushing it and passing the powders through a 40-60-mesh sieve.    TECHNOLOGY FOCUS - PHARMACEUTICALS - Preferred Compound: In the compound, the Pediococcus is one of or several of P. cerevisiae, P. acidilactici, and P. pentosaceus. The quantity of the pediococcus accounts for 60-75% of the total amount of the bacteria. The microzyme is one of or several of Candida albicans, Saccharomyces cerevisiae, Pichia pastoris, Dekkera, beer yeast, and Debaryomyces. The quantity of the microzyme accounts for 15-25% of the total amount of the bacteria. The Bacillus is one of or several of B. subtilis, B. licheniformis, B. sphaerieus, B. coagulans, and B. amyloliquefaciens. The quantity of the bacillus accounts for 6-15% of the total amount of the bacteria. ACTIVITY - Plant Protectant.