Heat exchange tube and machining method thereof

The invention discloses a heat exchange tube and a machining method thereof, and relates to the field of heat exchange equipment, in particular to a heat exchange tube and a method for machining the heat exchange tube. The heat exchange tube comprises a tube body, and an inner hole of the tube body comprises a spiral section and a straight section which are arranged at an interval in the length direction; a spiral groove serving as a flow channel is formed in the inner surface of the spiral section; the inner surface of the straight edge section is an inner cylindrical surface; after the pipe wall of the pipe body is unfolded into a metal belt, the normal section of the spiral groove comprises a hollow triangular area, the first vertex of the triangular area is located on the side close to the outer wall of the pipe body, and the connecting line of the second vertex and the third vertex is parallel to the plane where the metal belt is located. And the notch of the spiral groove is connected with a semi-closed