China hosts abundant skarn⁃type gold deposits, with a cumulative proven gold reserve of 1 871 t,accounting for 11 % of the national total. Based on the geochemical characteristics of ore⁃forming intrusive rocks,skarn⁃type gold deposits can be classified into 2 categories: oxidized and reduced types. Although previous studies haveconducted systematic investigations on skarn gold deposits worldwide, comparative analyses between oxidized andreduced skarn gold systems remain insufficient, and their redox differences are still unclear. Through a systematicreview of previous research, this study compares the 2 deposit types in terms of metallogenic tectonic settings, intrusiverock characteristics, alteration mineral assemblages, ore⁃forming fluid properties, and metallogenic models. The keyfindings are as follows: ①Both types of skarn gold deposits predominantly form in oceanic island arc and continentalmargin orogenic belt settings.② Intrusive rocks in oxidized skarn gold deposits are characterized by high oxygen fugacity（fO2>（fO2（FMQ）+ 2））and well⁃developed magnetite, with whole⁃rock w（Fe₂O₃）/w（Fe₂O₃+FeO）> 0.4, whereas those inreduced skarn gold deposits are dominated by ilmenite and pyrrhotite, with w（Fe ₂O ₃）/w（Fe ₂O ₃ + FeO）≪ 0.75.③Skarn alteration in oxidized deposits is dominated by diopside, with garnet contents significantly higher than pyroxene,and the associated metal assemblage is Au-Cu-Mo-Pb-Zn; in reduced deposits, skarn alteration is dominated byhedenbergite, with garnet and pyroxene in comparable amounts, and the metal assemblage is Au-As-Te-Bi. ④Bothtypes exhibit a fluid evolution trend from high⁃temperature, high⁃salinity to medium⁃low temperature, low⁃salinityconditions, but fluids in reduced skarn gold deposits are enriched in CH ₄ . ⑤The metallogenic model of skarn golddeposits involves high⁃temperature, metal⁃rich magmatic hydrothermal fluids driven by tectonic activity formingprograde skarn alteration（garnet, pyroxene）. As temperatures decrease, rock fracturing dominated by skarn⁃type alteration(hydroussilicateminerals)promotesAu-Agmineralization,withmeteoricwatermixingduring the final low⁃temperature stageforming quartz⁃carbonate veins marking the end of mineralization. A notable distinction is that oxidized skarn golddeposits are commonly associated with Cu-Mo mineralization, whereas reduced skarn gold deposits are often accompaniedby W-Sn mineralization. This study also summarizes key scientific issues in current research on skarn⁃type gold depositsand suggests that future work should integrate advanced techniques such as diffusion chronology, nanoscale mineralstructural analysis, and machine learning to further unravel metallogenic mechanisms.