The invention discloses a heat exchange tube. The heat exchange tube comprises a snake-shaped tube which is bent to form a plurality of heat exchange tube sections (1); axial heat exchange fins (2) are connected with both sides of each of the heat exchange tube sections (1) respectively along the axial direction; a plurality of radial heat exchange fins (3) are connected with the heat exchange tube sections (1); and each of the radial heat exchange fins (3) comprises a first heat exchange fin section (31) and a second heat exchange fin section (32) which are connected with both sides of the corresponding heat exchange tube section (1) along the radial direction and clamp the corresponding radial heat exchange fin (2) in a gap between the first heat exchange fin section (31) and the second heat exchange fin section (32). Due to the structural design of the heat exchange tube, the heat exchange area of the heat exchange tube can be increased effectively on the basis of not increasing or not increasing the occupied area in a large scale, so that the heat exchange efficiency of the heat exchange tube can be improved obviously. The invention also discloses a smoke heat exchanger comprising the heat exchange tube.