[en] The electron gun was developed and will be used on the Cockcroft-Walton accelerator for electron irradiation processing. The structure, size and operation parameters were optimized by electron beam test. The results show that its main performance data are electron beam 5-20 keV/60-100 mA, beam spot φ15-30 mm, half diverge angle 0.6 degree -1.6 degree, instability ±0.6%,and the life time more than 5 000 h. (authors)