Abstract: This paper is the coutinuity of the reference[1]. Under the case that the conditions of the Maxwell's equations, the equations of the rate, and corresponding to difference scheme are not varied, the equations of the primary electrons are solved by Euleran method. The difference scheme of the equations of the primary electrona are derived in the cne-dimensional plane and the two-dimensional cylindrical coordinate. At the same time, the model of the two-dimensional cylinder are numerically caltulated. Both the calculating results of this paper and the reference[1]are discussed in the reference[2].