The invention relates to a fume hood for a dry-ice decontamination system for nuclear power and belongs to the technical field of nuclear power equipment. The fume hood comprises a box body with a door. The interior of the box body is separated into a cleaning chamber and an exhaust chamber through a partition plate. A detachable supporting seat is arranged in the cleaning chamber and provided with a rotary disc. A telescopic sliding rail is arranged on the portion, located above the supporting seat, in the cleaning chamber and provided with a hoisting device in a matched and slidable manner. Operation holes with gloves are formed in one side wall of the cleaning chamber. An air inlet flange is communicated with the outer wall of the other side wall of the cleaning chamber. A primary filter is arranged in the air inlet flange. A ventilation opening is formed in the partition plate and provided with a high efficiency filter. A draught fan with an exhaust pipe is arranged in the exhaust chamber. The exhaust pipe is communicated with the outer portion of the box body. The fume hood for the dry-ice decontamination system for nuclear power is easy and convenient to operate, good in decontamination and cleaning effects, high in humanization degree, visual, high in structural strength and environment-friendly.