Abstract: The antifracture property of concrete container for nuclear waste was investigated to ensure its long-time durability. According to RILEM Standard the three-point-bending test was carried out comparatively for the hybrid fiber reinforced concrete and the plain high-strength concrete (SP-13) at normal temperature and after 150°C heating. The results showed that the fracture energy of the former is 6.3-12.0 times higher than the latter before heating and 12.0-16.7 times higher than the latter after heating. The big-size steel fibers (types A and C) are superior to both the small-size steel fibers (type B) and polypropylene fibers in absorbing fracture energy, and the type C steel fibers (shear-indented type) is superior to type A (shear-threaded type)and type B (ultra-short/fine type)in improving the fracture energy. Based on the comprehensive flexure toughness index and the comparative analyses of range and variance, a conclusion is drawn that the types A and C are applicable to the materials to make concrete containers for nuclear waste.