Tungsten, with excellent properties, has become one of the candidate materials for plasma facing materials in nuclear fusion reactor. During the operation of nuclear fusion reactor, the transmutation element Re generated by neutron irradiation of tungsten, which will continue to produce and accumulate in tungsten to form the transmutation product tungsten-rhenium alloys. Therefore, the thermodynamic parameters and thermal loading resistance of tungsten plasma facing materials have changed, which will affect the service properties of plasma facing materials, and even related to the stable operation of the reactor. At present, the generation of fusion high-energy neutrons under laboratory conditions is limited. Therefore, the research on the transmutation product tungsten-rhenium alloys is mainly based on the tungsten-rhenium alloys prepared in the laboratory. In this paper, the major preparation processes and thermal loading behavior of tungsten-rhenium alloys at present are summarized, and the existing scientific problems in the thermal loading behavior of tungsten-rhenium alloys are analyzed, which provides reference for the application of tungsten as plasma facing materials in future nuclear fusion reactor.