Abstract: The W-1.5%La₂O₃-0.1%Y₂O₃-0.1%ZrO₂ and W-1.5%La₂O₃-0.1%Y₂O₃-0.08%ZrH₂ electron emission materials were prepared by the intermediate frequency induction heating sintering method. The density of the sintered sample is about 95.5%. The thermionic emission test results show that the zero field emission current density of the thermionic emission material sample added with zirconium hydride is greater than that of the sample added with zirconia. The analysis illustrates that the added zirconium hydride decomposes during sintering, and the active Zr can capture tungsten. The impurity oxygen in the grain boundary purifies the grain boundary, thereby improving electron emission; Vickers microhardness measurement shows that the hardness of the sample with zirconium hydride added is higher than that of the sample with zirconium oxide. Analysis shows that the addition of zirconium hydride effectively improves the bonding between the tungsten crystal grains and enhances the hardness of the tungsten electron-emitting material. The samples were characterized by SEM, EDS, XRD, metallographic microscope and other surface analysis equipment. The structure shows that the addition of zirconium hydride, compared with the addition of zirconia, not only decreases the size of tungsten grains from 13.63 μm to 11.63 μm, but also decreases the size of the rare earth phase from 1.87 μm to 1.66 μm. This change in organizational structure is conducive to electron emission.