The invention relates to a system for treating persistent organic hazardous waste. The system comprises a pyrolysis dry distillation furnace and a discharge machine, wherein the pyrolysis dry distillation furnace comprises a furnace body, a distribution plate and a gas heater, wherein the furnace body is a sealed chamber; the distribution plate is mounted on the furnace bottom of the furnace body;the distribution plate and the furnace bottom can synchronously rotate; the gas heater is arranged above and/or below the distribution plate; a feed inlet, a pyrolysis gas outlet and a solid productoutlet are formed in the furnace body; the gas heater comprises a pyrolysis gas inlet, a heating air inlet and a flue gas outlet; the discharge machine comprises a solid product inlet, an air inlet, aheating air outlet and a cooled solid product outlet; the air inlet and the heating air outlet are separately formed in the two sides of the discharge machine; the pyrolysis gas outlet is connected with the pyrolysis gas inlet; the heating air inlet is connected with the heating air outlet; and the solid product outlet is connected with the solid product inlet. The invention further relates to amethod for treating persistent organic hazardous waste. The system can be stably operated for a long time, and the failure rate of devices is extremely low.