A heat pipe processing method includes steps of providing a metal tube with openings at two ends, where an inner wall of the metal tube has a capillary structure surface; and oxidizing the capillary structure surface so as to form an oxidized structure surface. In another embodiment, a heat pipe includes is provided, including a metal tube, a working fluid, and a first oxidized structure. An inner wall of the metal tube has a first area. The working fluid is filled in the metal tube. The first oxidized structure is formed on the inner wall defined by the first area, and the working fluid has a first contact angle on the first oxidized structure.