Abstract:High-purity indium plays an indispensable role in the display, semiconductor, and photovoltaic industries due to its unique semiconductor properties. With the rapid advancement of electronic information technology and related devices, the demand for high-purity indium has been steadily increasing, thereby imposing increasingly stringent requirements on its purification technologies. This paper reviews the application fields of high-purity indium and the research progress in its physical purification technologies. The applications of physical purification techniques such as vacuum distillation, zone refining, and directional solidification in the preparation of high-purity indium are discussed in detail. Finally, based on the current state of development, the paper proposes future directions for high-purity indium purification technologies, including enhancing the penetration of intelligent systems, improving the integration of process chains, and further deepening the construction of theoretical frameworks under multi-modal and multi-variable conditions.