The Chepaizi area is an emerging breakthrough area for the investigation and evaluation of sandstone-type uranium deposits in the Junggar Basin. With the Neogene Shawan Formation as the main target layer, multiple industrial uranium ore holes and uranium mineralized holes have been discovered. However, the hydrogeological research foundation is weak. Based on the integration of previous achievements, this study comprehensively uses methods such as drilling verification, hydrogeological investigation, and systematic sampling, combined with the preparation of maps and data calculation, to deeply analyze the groundwater dynamic conditions, hydrochemical characteristic patterns, uranium source conditions, and construct its hydrodynamic evolution process. The study shows that during the sedimentary period of the first member of the Shawan Formation, the Zhaier Mountain in the north and the Tianshan Mountain in the south respectively provide the main uranium-bearing oxygenated water for the region. The dual provenance recharge lays a prerequisite for uranium mineralization. Later, the "recharge window" is closed, and the mineralization process is initiated. The area around Regiment 128, due to its location in the convergence area of the dual provenance, has well-developed sand bodies and a long-lasting uranium mineralization process, and possesses the most superior hydrodynamic conditions for uranium mineralization. This study has clarified the groundwater chemical and dynamic conditions in the Shawan Formation of the Chepaizi area that are conducive to uranium mineralization, and confirmed its good provenance foundation for uranium mineralization.