To ensure the Long term durability of nuclear waste, the compressive strength, slump constant and impermeability of fiber reinforced concrete are carried out after being heated to 150 ℃. By the gradation analysis, the quantification of effects of the steel fiber(A,B), polypropylene fiber（C）and fly ash（D）on the properties of concrete were done. By postponing the time for roasting, the impermeability of the specimens, adjusted by the method of steepest ascent and steel fiber reinforced concrete and high strength concrete were tested. It is concluded that: the effect on impermeability of hybrid fiber reinforced concrete after being heated:A>C>D>B. The impermeability of roasted fiber reinforced concrete and high strength concrete would degrade obviously. The impermeability of steel fiber reinforced concrete SP 10 is better than high strength concrete SP 13 after being heated 17 days. The hybrid steel fiber(A and B) reinforced concrete is suitable to the nuclear waste container.
