Abstract: High-entropy alloys exhibit outstanding properties owing to their multi-principal-element design and high-entropy effects. Nevertheless, conventional forming processes fail to produce complex shapes while maintaining microstructural uniformity. This bottleneck severely hinders their industrial application. Additive manufacturing (AM) provides a revolutionary solution for complex component forming and microstructure precision control. In this paper, the research status of mainstream additive manufacturing technologies such as laser powder bed melting and directional energy deposition in the preparation of high-entropy alloys is systematically reviewed. The typical systems of additive manufacturing high-entropy alloys and the microstructure characteristics, mechanical properties and functional properties in the AM process are summarized. Studies have shown that AM technology can refine grains, inhibit harmful phases, promote the formation of metastable phases, and significantly improve material properties through rapid solidification and thermal cycling. However, it still faces challenges such as complex process parameters, crack sensitivity, high preparation cost, and insufficient multi-scale simulation. In the future, machine learning should be actively used to optimize the process-organization-performance relationship, develop new AM technology and post-treatment process, design low-cost alloy system, and realize intelligent design combined with cross-scale simulation.