Abstract: Metal additive manufacturing technology has the characteristics of arbitrary complex structure workpiece forming, and the high cost and inconsistent performance of powder raw materials are the primary barriers to widespread adoption. Without affecting the performance of parts, powder reuse can reduce the cost. Ti-6Al-4V, IN718 alloy and 316L stainless steel and other alloys were studied in this paper, the common preparation methods of different spherical alloy powders were introduced in detail, evolution mechanism of powder physicochemical properties under different powder bed additive manufacturing processes were summarized, the reusability of different alloy powders was discussed and the research trend of powder reuse was proposed. This article provides perspectives and recommendations for relevant researchers, and provide reference for the standardized reuse of alloy powder.