High-entropy alloys (HEAs) exhibit outstanding mechanical properties, thermal stability, and corrosion resistance due to their unique alloy compositions and the uniform distribution of multiple elements. Consequently, these novel materials have become a research hotspot in the field of materials science in recent years. Serrated flow behavior is a significant and characteristic phenomenon observed during the plastic deformation of high-entropy alloys, typically manifested as irregular fluctuations in the stress-strain curve. This behavior reveals the complex dynamic mechanisms within the material and is closely related to microstructural evolution, such as dynamic strain aging and dislocation movement. Studies have shown that serrated flow behavior presents different characteristics under various external conditions, significantly impacting the mechanical properties of the materials. In recent years, researchers have extensively investigated the mechanisms behind serrated flow behavior, its influencing factors, and its effects on the performance of highentropy alloy materials, uncovering the essence of phenomena such as dislocation slip and localized strain concentration within these alloys. This article systematically reviews the latest research progress on serrated flow behavior in high-entropy alloys, focusing on the theoretical foundations,experimental methods, and quantitative analysis of characteristic parameters.The aim is to provide theoretical guidance for further improving the mechanical performance and engineering applications of high-entropy alloys.