Abstract: Inhibitory effects of Chinese leek (Allium tuberosum)on Fusarium wilt of Baxi banana(Musa AAA Cavendish subgroup) were investigated with field tests, experiments in greenhouse and laboratory. Field tests showed that the disease incidence of Fusarium wilt in the banana planted immediately after harvesting Chinese leek was decreased to 1.73% in comparison of 52% in control in the first year. Pot experiments demonstrated that Chinese leek inhibited disease incidence and disease severity by 85.9% and 82%, respectively. Laboratory experiments showed that 10 mL water extract of Chinese leek suppressed proliferation of the spores of Fusarium oxysporum f. sp. cubense by 91.2% and the incidence of lethal incidence was 86.97%. These results indicated that Chinese leek-banana rotation system was an efficient way to control banana Fusarium wilt, and Chinese leek and its productions are promising to be environment-friendly biology agents for banana Fusarium wilt control.