Abstract: The beam current characteristics of a two-component space-charge diode under the effect of electron injection with initial energy are studied. The diode is divided into two regions, by solving Poisson equations in the two regions, to yield analytical expressions for space-charge-limited electron/ion beam current densities of non-relativistic one-dimensional slab two-component fluxe diode as a function of the initial energy of electrons emitted from the cathode, and compared with these results of zero initial energy of electrons, the results show that the two-component space-charge-limited current densities decrease as the initial energy of electrons increase.