Eutectic high-entropy alloys are multi-component alloys that undergo eutectic transformation during solidification. It has excellent liquid filling ability and mechanical properties and is suitable for the production of parts with complex shapes and high mechanical properties that cannot be processed by thermomechanical processing. An eutectic high-entropy alloy has at least four elements, and the phase component and microstructure are not sensitive to changes in the alloy composition, leading to a large space for performance control and process windows. Various excellent properties can be superimposed by adjusting the phase component and eutectic microstructure. In this paper, the research status of eutectic high-entropy alloys is reviewed from the perspectives of the design method, preparation technology, microstructure, mechanics and physical and chemical properties. The future development of eutectic high-entropy alloys is proposed.