Abstract: The irradiation testing of the fuel element for 10 MW high temperature gas-cooled reactor(HTR-10) in Tsinghua University is being carried out in the Russian IVV-2M research reactor. This testing started on July 13,2000. Up to June 14,2002, the maximum burnup and fast neutron fluence reached 77 000 MW · d/t and 8. 59× 1020/cm2, respectively. The paper describes the performance of the irradiation samples, irradiation equipment, irradiation condition and the irradation results obtained already.