A shrinkage-free sealing structure of a heat pipe. The sealing structure
is in the form of a double-layered structure formed by transversely
pressing a first side of an open end of the heat pipe towards a second
side of the open end and transversely pressing the second side towards
the first side. Preferably, the double-layered structure has a
semi-circular cross section after the first side is pressed towards the
second side of the open end, and the sealing structure has an arrowhead
structure after the second side is pressed towards the first side.