In order to investigate effect of lodging on root and yield of maize and the effect of binding after the natural disaster ‘Bolaven’ typhoon, root dry weight, yield and yield characters were determined. The results showed that there was not significant difference of root dry weight between lodging and non-lodging for varieties of ‘Zhengdan 958’ and ‘Xianyu 335’. root dry weight of ‘Zhengdan 958’ was 100% higher than that of ‘Xianyu 335’, and the difference between the two reached significant level. Reduction of yield of different lodging ranged from 0.5% to 21.3%, the average was 10% for two varieties in three tests land. Maize yield of no binding after lodging was 5.3% lower than that of binding, but the difference was not significant.