根据三原子CO2分子的电子结构，建立了双电子一维模型，采用对称分裂算符法求解含时薛定谔方程，计算了CO2分子模型体系在800 nm波长脉冲激光激发下的高次谐波(HHG)谱。结果发现，该模型计算量适中，可很好地描述CO2分子的HHG谱性质，用于激发HHG的激光脉冲宽度对HHG谱性质影响很大，多正电中心导致HHG谱呈现干涉相消现象。

One-dimensional dual-electron model for CO2 is suggested on the basis of the electron configuration. Time-dependent Schrdinger equation is numerically solved by deploying symmetric split-operator technique for high-order harmonic generation (HHG) spectra of the CO2 model that is exposed to 800 nm wavelength laser pulses. The computed results show that the present model for CO2 is moderate for computational load, and is able to elucidate the HHG characteristics. Laser pulse parameters play an important role in HHG, and the multi-cation nature of molecule may be responsible for the destructive interference in HHG spectra.