利用局部伽辽金矩量法,建立了电子注空间电荷场的2.5维计算模型.将空间电荷场在径向展开为各个模式的叠加,利用伽辽金级数表示,通过求解其系数方程组,最终求得空间电荷场.利用本文的模型,计算分析了电子注空间电荷场的特性,并研究了模型中仿真参量对空间电荷场计算结果的影响.本文的空间电荷场计算模型利用粒子模拟基本方法,可以应用到速调管注波互作用计算模型中. Using the local Galerkin moment method, a 2.5-D computational model of the charge field in the electron-injection space is established. The space charge field is expanded in a radial manner to superpose each mode, which is represented by the Galerkin series. By solving the system of coefficient equations, The space charge field is obtained.The model of this paper is used to calculate and analyze the characteristics of the charge field in the electron injection space and to study the effect of the simulation parameters on the calculation of the space charge field in this model.The space charge field calculation model in this paper uses the basic method of particle simulation , Which can be applied to the kurtosis interaction calculation model of klystron.