用一简化模型对ＤＮＡ非线性局域激发的机制作了初步的研究，用五阶ＲｕｎｇｅＫｕｔａ数值计算来模拟ＤＮＡ分子中Ｎ个非线性耦合碱基对的大振幅运动。通过适当选取Ｈ量中各参数及步长，调节色散效应与非色散非线性效应的比份以利于动力学稳定，使结果能初步给出非线性局域激发的形成与稳定传播的物理图象。并能看出非线性效应对ＤＮＡ分子的“呼吸”效应的重要影响。 A simplified model of DNA non-linear local excitation mechanism made a preliminary study, using fifth-order Runge-Kuta numerical simulation to simulate DNA molecules N non-linear coupling base pairs of large amplitude motion. By proper selection of parameters and steps in H, the ratio of dispersion effect to non-dispersive non-linearity effect can be adjusted to facilitate the dynamic stability. The result can give a preliminary physical image of nonlinear local excitation and stable propagation . And can see the important effect that the non-linear effect has on the “respiration” effect of DNA molecules.