CO₂ geological storage is one of the most important methods for reducing the emissions of anthropogenic greenhouse gases into the atmosphere. Junggar Basin is an important energy base in China, with high CO₂ emissions and geological storage potential. The evaluation of the suitability for CO₂ geological storage is the basis for screening CO₂ geological storage sites, and a scientific and effective evaluation method is key. Using the Junggar Basin as the study site, an indicator system consisting of 3 indicator layers and 27 indicators was constructed. By combining the analytic hierarchy process and fuzzy comprehensive evaluation method, the geological suitability for CO₂ geological storage in 44 secondary tectonic units in the Junggar Basin was evaluated. The evaluation results provide a scientific basis for site selection and project construction for CO₂ geological storage in the Junggar Basin.