Abstract: The effect of electron radiation on LED was studied. Making use of the electron beam from electron accelerator to simulate the space electron irradiation, test the energy electron was at 1.0 MeV and the maximal total dose at 1106 rad(Si). The optical, electrical and annealing properties were measured after radiation. The results showed that with the increase of radiation dose, LED's light power degenerated linearly, while its voltage increased, and the degenerate extent was diverse in different experimental conditions. In addition, after a period of annealing time, LED's capability recovered to some extent and kept stable. The experimental result was analyzed and discussed through the mechanism of electron radiation.