Abstract: In order to study the waterlogging characteristics of green pepper plants, the paper analyzed the initial flood tolerance characteristics of green pepper plants. It was found that the yield, plant height and chlorophyll content of green pepper plants were significantly lower than that of the control after the flooding treatment, which having no significant effect on plant water saving growth rate. Fitting the experimental data,a mathematical model between the relative yield of green pepper and the comprehensive drainage index of waterlogging was obtained. According to the model, when the scale of the drainage control index is selected, if the yield of green pepper is to be more than 70% of the relative yield, the drainage control index should be kept at 75.0 cm·d at the beginning of the harvest.

Key words: green pepper, flooding resistance, drainage index