Schima superba,one of the typical components of subtropical evergreen broad-leaf forest community,suffered from 2008 ice and snow storm.With five 400 m² established plots in Jianglangshan Mountain,located in Zhejiang Province,the response of photosynthesis rate to light intensity and CO₂ concentration in different patterns of S.superba (uprooted and decapitated trees) were measured and fitted through exponential equation method by using Li-6400 portable photosynthesis system.Meanwhile,the chlorophyll fluorescence parameters of different segments of damaged trees were studied.The results are showed as follows:(1)The slope of initial phase light response curve of decapitated trees was higher than that of uprooted trees.With the increase light,the decapitated trees achieve the light saturation point earlier and lower than that of uprooted trees.The slopes of initial phase of the CO₂ response curve of uprooted and decapitated trees were similar.With the increase of CO₂ concentration,each curve has a similar trend.(2)The maximum net photosynthetic rate of saturated light (P_Lmax),the maximum net photosynthetic rate of saturated CO₂ (P_Cmax),light compensation point (LCP),light saturation point (LSP) and effective photochemical efficiency of PSⅡ (F_v′/F_m′) of uprooted trees were 22.03% (P<0.05),5.22% (P>0.05) 13.73% (P>0.05),52.48% (P<0.05) and 22.53% (P<0.05) higher than that of decapitated trees.(3)P_Lmax,P_Cmax,the maximal photochemical efficiency of PSⅡ (F_v/F_m),effective photochemical efficiency of PSⅡ (F_v′/F_m′),potential activity of PSⅡ (F_v/F₀) and electron transport rate (ETR) of uprooted trees were the highest in basal segment,followed by those in middle segment,and those in top were the lowest.F_v/F_m,F_v′/F_m′,F_v/F₀,ETR,P_Lmax and P_Cmax of decapitated trees were the highest in top and middle segment,and those in basal were the lowest,while there were no significant difference between those segments of decapitated trees (P>0.05).The photosynthetic capacities of uprooted trees was higher than that of decapitated trees.The photosynthetic capacities of basal of uprooted trees and top of decapitated trees were higher than that of other segments.