Abstract: China is rich in skarn-type gold deposits, with cumulative proven gold reserves of 1 871 t, accounting for 11 % of the national gold reserves. According to the geochemical characteristics of ore-forming intrusive rocks, skarn-type gold deposits can be divided into oxidized and reduced types. Although previous studies have systematically investigated global skarn-type gold deposits, comparative analysis of oxidized and reduced skarn-type gold deposits remains insufficient, and the genetic mechanism of their redox differences is still unclear. By systematically reviewing previous research results, this paper conducts a comparative study from the aspects of metallogenic tectonic setting, intrusive rock characteristics, alteration mineral assemblage, ore-forming fluid characteristics, and metallogenic model, and draws the following conclusions: ① The two types of skarn-type gold deposits are mainly formed in oceanic island arc and continental margin orogenic belt environments. ② The intrusive rocks of oxidized skarn-type gold deposits are characterized by high oxygen fugacity (f_O2 > (f_O2(FMQ) + 2)) and magnetite development, with whole-rock w(Fe₂O₃)/w(Fe₂O₃ + FeO) > 0.4; while the intrusive rocks of reduced skarn-type gold deposits are dominated by ilmenite and pyrrhotite, with w(Fe₂O₃)/w(Fe₂O₃ + FeO) ≪ 0.75. ③ The skarn alteration of oxidized skarn-type gold deposits is dominated by diopside, with garnet content significantly higher than pyroxene, and the metal element assemblage is Au-Cu-Mo-Pb-Zn; the skarn alteration of reduced skarn-type gold deposits is dominated by hedenbergite, with similar contents of pyroxene and garnet, and the metal element assemblage is Au-As-Te-Bi. ④ The ore-forming fluids of both types of skarn-type gold deposits show a trend of evolution from high temperature and high salinity to medium-low temperature and low salinity, but the fluids of reduced skarn-type gold deposits are rich in CH₄. ⑤ The metallogenic model of skarn-type gold deposits is characterized by high-temperature metal-rich hydrothermal magmatic fluids, which form prograde skarn alteration (garnet, diopside, etc.) through tectonic driving; with decreasing temperature, under the dominance of retrograde skarn alteration (hydrous silicate minerals), rock fracturing promotes the formation of gold-silver mineralization, and finally, in the low-temperature stage, meteoric water mixes in to form quartz-carbonate veins, marking the end of mineralization. The difference is that oxidized skarn-type gold deposits are often accompanied by copper-molybdenum mineralization, while reduced skarn-type gold deposits are often accompanied by tungsten-tin mineralization. By further summarizing the scientific problems existing in the study of skarn-type gold deposits, it is proposed that future research should combine frontier technologies such as diffusion chronology, mineral nanostructure analysis, and machine learning to deepen the study of metallogenic mechanisms.