Composite heat exchange type hot blast stove

The utility model relates to a composite heat exchange type hot blast stove which mainly solves the problems of short service life, poor safe performance, complicated structure and high cost of a hot blast stove. The utility model is characterized in that a hearth (2) is arranged under a stove body (20); a stove cavity (26) is communicated with a downcomer (7) through an ascending pipe (6); the ascending pipe (6) and the downcomer (7) are separately coupled with an upper and a lower coupling boxes (8 and 9). An axial flow fan (11) is connected with one side of a radiating pipe (10); smoke boxes (12, 14 and 25) are arranged on the hearth (2); smoke pipes (13) are arranged among the smoke boxes (12, 14 and 25); a smoke box baffle plate (24) is arranged between the smoke boxes (12 and 25); a dust falling hole (17) and a baffle plate (18) of the dust falling hole are arranged on the smoke box baffle plate (24). The smoke box (12) is communicated with a smoke outlet (19); an ash cleaning door (15) is connected with the smoke box (14). The hot blast stove has the advantages of long lifetime, simple structure, safety, high efficiency, energy saving and stable continuous use.