Abstract: To study the effects of simulate temperature change on photosynthesis of Lycoris radiata in winter and spring, the photosynthesis indexes were measured through the artificial climate chest to fix the environmental temperature with the change of cuvette temperature. The results showed that compared with 15℃, the photosynthesis of L. radiata was affected by mild hypothermia at 5℃, the net photosynthetic rate (Pn) was much lower than that under 15℃, but the initial quantum efficiency (α) was much higher. Under different temperatures, the photosynthetic light- response curves were different: when the ambient temperature was 15℃, the normal curve only appeared when cuvette temperature was equal to ambient temperature, and light saturation point (LSP) appeared at low light intensity; when ambient temperature was 5℃, the photosynthetic light-response process was normal when the cuvette temperature was above or below 10℃ (5, 15, 20℃), as the cuvette temperature rose, Pn dropped almost to zero.