The utility model belongs to the technical field of low or middle radioactive waste disposal equipment, a waste treatment equipment is related to, low or middle radioactive waste disposal device especially for the organic flammable type of discarded object that contains low or middle radioactive substance of handling that the nuclear power plant produces also can be used for handling the low or middle radioactive substance discarded object that hospital, mill, research institution etc. Produced, and that realizes low or middle radioactive waste subtracts appearanceization and innocent treatment, include pyrolytic reaction ware, combustor, catalytic converter, spray washing tower and resistant high temperature tube way, communicate with each other through resistant high temperature tube way between each device, it is convenient for seal up up for safekeeping, landfill treatment, subtracts the appearance rate and exceedes 95%, can eliminate nuclear radio contamination and atmosphere environmental pollution, adopt gentle hot catalytic degradation technology, its simple structure, principle are reliable, and it is high to subtract the appearance rate, and stabilizing effect is good, use environment friendly, and investment and operation cost are low, and environmental protection effect is good, has good economic benefits and wide market prospect.