PURPOSE: Synthesis soil microorganisms are provided to recover polluted soil with microorganism and to grow plant without disease and insect damage by using soil microorganism and antagonistic microorganism. CONSTITUTION: Synthesis soil microorganisms are characterized by: (i)using soil microorganism and antagonistic microorganism; (ii)adding hardwood charcoal; (iii)after mixing a snowbell fruit, potato peel, corn, grinding minutely; (iv)after boiling at over 100 deg.C for 15 min, fermenting for a year; (v)collecting yellow supernatant; (vi)performing extermination of insects by using the supernatant.