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The price of alloying element Bi is low, and it has a high solid solubility in magnesium, and with the decrease of temperature, its solid solubility decreases, and the Mg3 Bi2 phase is precipitated, which improves the mechanical properties of magnesium. Therefore, Mg-Bi alloys have good solution and aging hardening potential. The addition of Sn, Mn, Al, Ca, Zn and other elements to Mg-Bi alloy can modulate the alloy microstructure and further increase the mechanical properties and corrosion resistance of the alloy. In this paper, the research progress of Mg-Bi alloys was introduced, and on the basis of summarizing the research achievements of Mg-Bi binary alloys, the microstructure and properties of Mg-Bi-Sn alloys, Mg-Bi-Mn alloys, Mg-Bi-Al alloys, Mg-Bi-Ca alloys, and Mg-Bi-Zn alloys were systematically summarized, and the effects of alloying on the second phase, grain size, texture and dynamic recrystallization of alloys were reviewed. The effects of alloying element types, addition amounts and hot working parameters on the mechanical properties of alloys were described, and the future research is prospected. The existing problems in the study of Mg-Bi alloys were summarized, and the future research was prospected. [ABSTRACT FROM AUTHOR]