对真实磁场进行拟合，根据电子光学原理以及绝热压缩理论，运用EGUN软件，设计了工作模式为TE34,19的170 GHz回旋管双阳极磁控注入电子枪。最终得到的电子注速度比约为1.3，速度零散小于3%。分析了调节磁场位置、阴阳极间距、阳极间距等因素对电子注性能的影响。结果表明：电子注的速度比和速度零散对于这些影响因子的变化比较敏感,随着阴阳极间距以及阳极间距的增加，速度比逐渐减小，速度零散先减小后增大。设计的双阳极电子枪已应用于整管实验中。

Based on electro-optical theory and adiabatic compression theory, a double-anode magnetic injection gunfor TE34,19，170 GHz gyrotron was analyzed and designed with EGUN software. Concerning with the factors such as positions of anode and magnetic field、distance between anodes, and we have got the result that the velocity ratio of electron beam approximated 1.3, the velocity spread was under 3%. At the same time, we found that electron beam were sensitive with these factors. Such as that the velocity ratio decreased when the distance between anodes increased, while the velocity spread decreased first and then increased. The double-anode magnetic injection gun was employed in the experiments of gyrotron.