【Objective】The objective of this study was to investigate the physiological mechanism of silicon-induced resistance of tomato plant to bacterial wilt.【Method】Pot experiments with soil and hydroponic cultivation were conducted to study the effects of silicon supply on the disease index of bacterial wilt and antioxidant enzymes of tomato leaves.【Result and conclusion】The results showed that exogenous Si treatment reduced the disease index of bacterial wilt by 29. 1%- 93. 0% respectively in soil cultivation ex...