High-entropy alloy is a new type of alloy developed in recent years, solving the problem of only one or two main components in traditional metal materials. Through significant increase in the number of components, sluggish diffusion effect and severe-lattice-distortion effect are achieved in high-entropy alloys. It is easy for high -entropy alloys to obtain ideal tensile strength and fracture toughness, which are particularly suitable for welding to improve the service performance of welded joints. The application of high-entropy alloys in welding field has broad prospects. At present, many scholars at home and abroad have tried to apply high-entropy alloys with multi-principal elements to the welding field. Therefore, this paper summarizes the development and research status of high entropy alloys in welding field, from the aspects of welding materials, welding methods, microstructure, hardness and mechanical properties. And the key scientific problems to be solved in the application of high-entropy alloys in welding field are provided. Finally, the prospects for future research direction in this field are proposed.