Abstract: Ultra high-performance concrete（UHPC） is a new type of cement-based composite material with ultra-high strength and durability, which has become a hot research topic in the field of engineering. Overall, its application is still affected by related factors, including high cost, insufficient toughness, and poor high-temperature anti burst performance. Relevant studies have shown that these factors are all related to the addition of fibers. In order to further promote the optimization of fiber performance in UHPC and promote the application of UHPC in the engineering field, the influence of steel fiber shape and aspect ratio, different fiber types, fiber mixing, and fiber orientation distribution on UHPC related properties was summarized by reviewing relevant research results at home and abroad in recent years. The results showed that steel fiber has excellent mechanical properties and is still the main fiber used in UHPC with a wide range of sources. Deformed steel fiber improves the tensile strength of UHPC The bending resistance and other performance effects are better, but the working performance will be correspondingly reduced. It is recommended to use a steel fiber content of 2% to 3%; There is an optimal combination for mixing different types of fibers, and the content of non-steel fibers generally does not exceed 0.5%; The distribution of fibers parallel to the main tensile stress direction can enhance the effectiveness of fiber bridging, and the effectiveness of randomly distributed fibers is reduced to 30%. The method for controlling fiber orientation is not yet mature, and further improvement is needed to achieve the actual size UHPC of fiber directional distribution under non laboratory conditions.