NOVELTY - A preparation device comprises fuel gas burner, air heating furnace, combustion fan, carbon chamber, circular fan, connecting rod mechanism on bottom of carbon chamber, dividing wall-type heating chamber, carbon chamber top end cover, thermoelectric couples, carbon chamber, gas outlet tube, exhaust-heat boiler, tubular condensator, circular fan, chimney, and insulating materials.    USE - Preparation device for complementary energy recyclable biomass grain activated carbon (claimed).    ADVANTAGE - The device has high efficiency, simple structure, flexible application, low pollution, and high carbon yield. It can save the energy.    DETAILED DESCRIPTION - Preparation device comprises fuel gas burner, air heating furnace, combustion fan, carbon chamber, circular fan, connecting rod mechanism on bottom of carbon chamber, dividing wall-type heating chamber, carbon chamber top end cover, thermoelectric couples, carbon chamber, gas outlet tube, exhaust-heat boiler, tubular condensator, circular fan, chimney, and insulating materials. A composite structure on a side of the air heating furnace has fuel gas burner and combustion fan, and the other side of the air heating furnace is connected with the dividing wall-type heating chamber. The carbon chamber is vertically made in a center of the dividing wall-type heating chamber. A connecting rod mechanism inserted in the carbon chamber is made on bottom of the carbon chamber. The insulating materials are wrapped on periphery of the dividing wall-type heating chamber. Two thermoelectric couples are in a space between upper and lower parts of a side of the carbon chamber in middle of the dividing wall-type heating chamber. A top end cover for sealing the dividing wall-type heating chamber is on top end of the dividing wall-type heating chamber. The top end of the dividing wall-type heating chamber passing through the top end cover is provided with connecting carbon chamber gas outlet tube and heating chamber smoke outlet tube. The carbon chamber gas outlet tube is connected to the top of the tubular condensator. The bottom of the tubular condensator is connected with air heating furnace. The circular fan is in the middle of the connecting channel in series. The heating chamber smoke outlet tube is connected with the exhaust-heat boiler. A cover board chimney is on the exhaust-heat boiler. The integrated device pipeline connecting structure is circularly combined into an integrated activated carbon preparing system for preparing the exhaust-heat or energy recyclable biomass grain activated carbon.