Abstract: The high-load conditions and harsh service environment in fusion reactors impose strict requirements on the performance of plasma-facing materials (PFMs). The development of PFMs has long been a key issue hindering the mature application of nuclear fusion. Tungsten is considered to be the primary choice for plasma-facing materials in nuclear fusion due to their high melting point, high creep resistance, excellent high-temperature strength, good thermal conductivity, excellent resistance to plasma sputtering and corrosion. However, the high ductile-to-brittle transition temperature and the low fracture toughness of tungsten limit its application. Tungsten fiber-reinforced tungsten composites (W_f/W) do not require the introduction of other metallic materials or impurity elements, maintaining high purity while possessing excellent crack resistance and damage tolerance. Their excellent mechanical properties provide a possible solution for the above problems. This article elaborates on the development process, toughening mechanism and interfacial optimization measures of W_f/W composites, summarizes and deepens the understanding of this material, and points out the direction for further material optimization.