Efficient phase change heat exchanging pipe and preparation method thereof

The invention belongs to the technical field of heat exchanging, and provides an efficient phase change heat exchanging pipe and a preparation method thereof. A heat exchanging pipe body is constituted by a plurality of plastic base layers with capillary structures, the plastic base layers are each of a double-layer structure, the double-layer structures are internally provided with the capillarystructures, the capillary structures are filled with easily-vaporized liquid working media. In the preparation process, the liquid working media filled in the capillary structures are heated, then vaporized, swollen and subjected to capacity expansion, and after cooling, a sealed cavity with the vacuum interior is formed, namely, the sealed cavity is internally provided with the easily-vaporized liquid working media and the vacuum formed after cooling, and the sealed cavity is equivalent to a miniature heat pipe. When the heat exchanging pipe serves as a part of a heat exchanger to work, the heat conductivity coeffici