Three groups of thermophilic cellulolytic bacteria, three strains of cellulolytic actinomyces and three strains of cellulolytic fungi were isolated and screened from soil horse feces and cow feces. Enzyme activity for group B 1 strain A 3 and strain F 3 were 5.66 mg·(g·h) -1 , 6.55 mg·(g·h) -1 and 5.76 mg·(g·h) -1 respectively. And percentage of cellulose in the rice stalk decomposed byB 1 A 3 and F 3 were 6.69%, 6.26% and 6.35 respectively.