Heat exchange tube

The utility model relates to a heat exchange tube which comprises a tube body (1) and main fins (2) which are distributed along the circumferential direction of the outer surface of the tube body (1) and are integrally connected with the tube body (1), and further comprises auxiliary fins (3) which are integrally connected with the outer ends of the main fins (2). Main fin grooves (21) are formed in the main fins (2); and auxiliary fin grooves (31) are formed in the auxiliary fins (3). The main fins and the auxiliary fins connected with the main fins are processed on the outer wall of the heat exchange tube, and the grooves are processed on the fins, so that the surface area of the heat exchange tube is greatly increased. Besides, the edges and the grooves on the fins form a plurality of sharp edges and corners, and the sharp edges and corners can play a role in puncturing the liquid film, reducing the tension of the liquid film and reducing the thickness of the liquid film, so that the falling film evaporati