Abstract: This study aims to clarify the geothermal geological condition difference of typical geothermal fields in various structural units of Yishu Basin and its impact on the recoverable heat single well, and provide support for the next exploration and planning of regional geothermal resources. Based on the geological structure and regional geothermal geological background of Yishu Basin, the authors comprehensively analyzed the geothermal reservoir characteristics of typical geothermal fields in the area. The grey correlation method and improved analytic hierarchy process were adopted and the weighted correlation between geothermal geological parameters (such as geothermal reservoir thickness, physical properties, and hydrochemical conditions) and single-well recoverable heat degree was calculated. And causes of differences in single-well recoverable heat among various typical geothermal fields were explored based on the stratum sedimentary conditions and distribution characteristics. The results showed that the main differences in geothermal geological conditions in the study area were geothermal reservoir permeability, porosity, and hydrochemical characteristics. The main geothermal geological conditions affecting differences in single-well recoverable heat among various typical geothermal fields were geothermal reservoir permeability, hydrochemical characteristics, and geothermal reservoir thickness. This study defined the control mechanism of relevant factors and sedimentary environment on geothermal reservoir formation, and clarified the correlation law between geothermal geological conditions and single-well recoverable heat. These findings could provide scientific basis for the accurate evaluation and efficient development of geothermal resources in Yishu Basin, and are of great significance for improving the scientificity and planning rationality of the development and utilization of regional geothermal resources.