The utility model discloses an environment -friendly pitch reation kettle, including the cauldron body, kettle cover, heating system, agitator motor, agitator and smoke treatment device, cauldron body bottom is equipped with the discharge gate, the kettle cover is equipped with air inlet, gas outlet and feed inlet, agitator motor sets up at the kettle cover top, the agitator then sets up at kettle cover bottom and agitator motor output shaft, smoke treatment device includes flue gas condenser and the flue gas adsorption equipment who follows flue gas flow and connect gradually, flue gas condenser's air inlet and kettle cover gas outlet intercommunication come from the flue gas particle size of the fogdrop increase in flue gas condenser is the flue gas earlier in the reation kettle, handle through adsorbing in then getting into flue gas adsorption equipment, discharge after detaching the harmful substance in the flue gas. This reation kettle can purify the pitch flue gas, reduces hazardous gas's emission.