Physio-ecological characteristics of the leaves of Lonicera japonica thunb growing in soils during the inspection in soil moisture content were measured and compared. Results showed that with the decrease in soil water content, the contents of chlorophyll a, chlorophyll b, total chlorophyll and specific weight of the leaves increased, but leaf area decreased. Drought of the soil exacerbated fluctuation of daily photosynthesis. When the relative soil moisture content was 30.01%, the valley value was 89.47% lower than the peak value. However, the total diurnal carbon fixation varied slightly. Lonicera japonica thunb adapted to drought by decreasing leaf area and increasing chlorophyll content and specific leaf weight.