Abstract：The Naiman trona deposit in Inner Mongolia is a supergiant deposit discovered in recent years in China, with identified resources of 2.077 billion tons, making it the largest trona deposit so far discovered in China and even in Asia. The deposit is located in the Naiman Sag on the southwestern margin of the Songliao Basin and is hosted in strata of the Lower Cretaceous Yixian-Jiufotang formations. It is characterized by high ore grade, great ore-layer thickness, relatively deep burial, and complex mineralogical composition. Vertically, it consists of interbedded trona ore layers, rock-salt layers and mudstones, forming as many as 118 sedimentary cycles, while horizontally it exhibits a lenticular distribution. Seven Na-carbonate minerals, including trona, nahcolite and natrocalcite, and eight associated minerals, including halite, anhydrite and searlesite, have been identified. A key scientific question is why large-scale trona enrichment took place in the Naiman area during the Early Cretaceous greenhouse period under an extensional tectonic regime. The ore-forming mechanism may be investigated from the following aspects: conducting in-depth studies on the role of fault systems as channels for hydrothermal fluid migration in an extensional setting, and on the effects of continuous basin subsidence on the formation and preservation of ore layers; resolving the material contributions of volcanic rock weathering, deep magmatic-hydrothermal fluids and high atmospheric CO2 concentrations by means of geochemical tracing techniques; precisely constraining the timing of mineralization by integrating radiometric dating with biostratigraphic methods; and elucidating the controlling mechanisms of paleoclimate and paleoenvironment on trona sedimentary cycles through a combination of paleoclimatic-paleogeographic proxies and sedimentary cycle analysis. Through this integrated metallogenic research framework that couples deep tectonic architecture, material sources, metallogenic timing and sedimentary paleoclimate-paleoenvironment, the formation mechanism and metallogenic model of the Naiman supergiant trona deposit can be revealed, which is of great fundamental scientific significance. Meanwhile, the research results will support exploration of trona deposits in the Songliao Basin and surrounding areas and promote the upgrading of China’s soda ash industry, thus having important strategic and practical significance.