The utility model provides a system for utilize giantreed preparation living beings adsorbent. This system includes soak device, washing device, drying device, regenerative radiant tube revolving bedpyrolysis oven, combustion chamber, exhaust -heat boiler, rotatory air heater and tail gas processing device. Washing device links to each other with soak device and drying device respectively, and regenerative radiant tube revolving bed pyrolysis oven links to each other with drying device and combustion chamber respectively, and exhaust -heat boiler links to each other with combustion chamber, rotatory air heater and regenerative radiant tube revolving bed pyrolysis oven respectively, and rotatory air heater still links to each other with drying device, combustion chamber and tail soak device 0 respectively. The system provided by the utility model utilize the biological charcoal of vapor activation giantreed under the high temperature condition, improved the adsorption efficiency of thebiological charcoal of giantreed, and used energy consumption is low.