The effect of three typical microorganisms was researched on how they may change the biological and chemical parameters of the compost.Significant correlations were proved among temperature,water content rate,pH,C/N,GI,Nutrient components and the number of coliform bacteria.The results showed that Inocula 3 could obviously increase fermentation temperature during early period of composting,reduce the effects of compost materials on seed germination index,and accelerate dehydration of compost materials and the maturity of composting.Among the microorganism agents studied,microorganism agents of Inocula 3 was better.