Abstract: Soil inorganic carbon（C）plays an important role in sequestering C, maintaining soil quality, promoting organic C stability and fertility and ecosystem service functions. Taking 472 documents of soil inorganic C research in Web of Science core ensemble database and CNKI database as the data source, we analyzed the results by using VOSviewer, CiteSpace and HistCite to measure and analyze the issuing countries, institutions, authors, research hotspots and their changing trends from the perspectives of issuing volume, citation frequency, intensity of cooperation and keywords, respectively. The results showed that the number of publications on soil inorganic C research has been increasing from 2003 to 2023, mainly from soil science and environmental science to other disciplines. The research institutions were led by the Chinese Academy of Sciences, and the authors of the publications have formed a group of authors with Kuzyakov Y as the core. The number of publications and the international influence of China was the largest. The current research hotspots focused on soil inorganic C storage and its influencing factors, the role of soil inorganic C in the C cycle and its sequestration potential, and the ecosystem service function of soil inorganic C. However, the transfer of organic C to inorganic C and C sequestration during carbonate redeposition was currently understudied, especially the conversion of plant photo-contracted C to soil secondary carbonate accumulation and the response mechanism to nitrogen fertilizer are still unclear. In the future, inorganic C data should be collected through field studies and combined with machine learning modeling to improve the accuracy of estimating the global C pool and the rate of C turnover; deepen the mechanism of soil organic C - CO₂ - soil inorganic C conversion, and further clarify the role of inorganic C in stabilizing the soil C pool and maintaining soil health and other ecological services.