Dynamic change rules of basic properties and microbial community during the composting process of three kinds of slaughterhouse waste were investigated.The results showed that the temperature of sheep waste increased most fast,while the temperature of pig waste was higher than the others.pH of all treatments showed uptrend in the first 21 d of composting,then was getting stable,and changed from 7.9 to 8.5 in 21～90 d.The germination index (GI) of three wastes increased with the composting process,GI of sheep waste was the highest and the pig wastes was the lowest in the midterm and late stage of composting.The vigor of weed seed and the amount of coliform were decreased throughout the composting process.The amounts of bacterium,actinomycete and fungi were all increased at the initial stage,and the degree of increased of bacterium was the biggest,bacterium was the dominant species.The amount of fungi of pig waste was significant higher than the others during the process.There were small different among the actinomycete of three kinds of wastes from beginning to middle period,however,the amount of actinomycete of beef wastes was the biggest and the pig wastes slumped after the 30 days.Compared with the national standard of biological organic fertilizer,their pH value,organic matter and nutrients,most probable number of coliform and rate of the eggs of insects killed have all reached the national standard.