To provide theoretical evidence to aid adaptive management of bamboo plantations operating under the background of climate change,we studied the effects of simulated increased atmospheric ozone concentrations on photosynthesis,lipid peroxidation and anti-oxidation enzymes in the leaves of Phyllostachys edulis (moso bamboo).The open-top chamber (OTC) test method was employed in conjunction with a split-plot design and ozone concentrations set to AA(40~45 nL·L^-1) and EO(92~106 nL·L^-1).The results showed that:(1)Compared with AA,ozone flux increased significantly in the leaves of Ph.edulis at the same treated time under EO;Ozone flux increased with the extension ozone exposure under AA and EO treatments.(2)Photosynthetic rate(P_n) and stomatal conductance(G_s) and soluble sugar content decreased significantly in the same treated time under EO,and chlorophyll(Chl) content and intercellular CO² concentration (C_i) decreased significantly in the treatment time of 60 d and 92 d respectively,while soluble protein content increased significantly after 60 d;With elongated ozone exposure,photosynthetic rate(P_n),intercellular CO₂ concentration(C_i),chlorophyll(Chl) content and soluble protein content decreased in the leaves of Ph.edulis,and soluble sugar content increased and then decreased.And we concluded the decline in P_n resulted from the stomatal conductance limitation.(3)Superoxide radical(O^-·₂) content and malondialdehyde (MDA) content and relative electrical conductivity increased significantly after the treatment time of 29 d,60 d and 60 d,respectively and shown a rising trend with the extension of processing time.(4)The activity of super oxide dismutase(SOD) increased significantly in the initial 60 days of ozone treatment,then decreased significantly and peroxidase activity(POD) increased significantly;The activities of SOD and POD increased and then decreased.The result illustrated that Ph.edulis responded in acclimation way in the initial O₃ fumigation period;but in the late period,the growth of Ph.edulis would be affected seriously.