The utility model provides a coal -fired energy -conserving stove of heating plant, including furnace and brickwork to and setting up the cold water wall between furnace and brickwork, its characteristics are furnace with still be equipped with the circulation of air passageway between the cold water wall, this circulation of air passageway is in with the setting the circulating fan intercommunication of furnace upper end, furnace's inner chamber be equipped with a plurality of with the sport pipe of circulation of air passageway intercommunication, the furnace bottom is equipped with upwards extends outstanding flamethrower. This technical scheme can make behind coal -fired and the air intensive mixing and light abundant burning, improves coal -fired burning utilization ratio.