To isolate biocontrol bacteria from healthy rice plants,which belong to different areas in Jilin province,and studying on biological activity against the pathogen of rice diseases such as rice blast (Magnaporthe grisea) and rice sheath blight(Rhizoctonia solani).Twenty-seven isolates produced inhibitory effect against M.grisea in the laboratory.And nine isolates were against both P.oryzae and R.solam. Among 4 tested isolates,G-05 was the best one against M.grisea and R.solam, which produced 50.8% and 44.7% control effect respectively to leaf blast and neck blast,and produced 46.1% control effect to rice sheath blight.G-05 was a good potential microbial control agent.