In order to study the relationship between biophoton emission of plant leaf and oxidative stress,the leaf of plant(Schefflera)is treated with different concentration H2O2 solution.The experimental result indicates that along with the time of leaf treated with the concentration 7.5%,15% and 30% H2O2 extension,spontaneous biophoton emission(BPE) of biophoton emission in leaf increased obviously compared with the control that the leaf had not treated with H2O2 solution,and the dynamics curves of delayed luminescence(DL) in leaf showed hyperbolic relaxation.Through the establishment of non-linear dynamics equation about DL and the mathematical simulation,the initial photon number I0,coherence time τ and weaken parameter β about DL are obtained.The analysis results discover that along with the time of leaf treated with H2O2 extension,initial photon number I0 of various treatment groups droped first,latter rose,then dropped again,but the values of coherence time τ and weaken parameter β of two treatment groups about 7.5% and 15% H2O2 stress presented fluctuation change,the values of τ and β of treatment group about 30% H2O2 stress presented the monotonous drop tendency.We extrapolated that the change of BPE had reflected the change of active oxygen content in cell under H2O2 stress,the change of initial photon number I0 of DL had reflected overall metabolism′s change in cell,the changes of τ and β about DL had reflected the adaptation and damage process about cell to H2O2 stress.