Abstract: Twenty and ninety rhizobacteria were isolated from the healthy and diseased Chinese cabbage individually, and their fluorescence reaction and HCN production were compared.The results showed that the rhizobacter amount possesses fluorescence reaction isolated from healthy cabbage was more than those of rhizobacteria from diseased plants, but there was no difference in the HCN production of rhizobacteria between healthy and diseased plants.However, there was significantly difference in HCN production between the fluorescence producing rhizobacteria isolated from healthy or diseased Chinese cabbage.