Abstract:The buried-hill reservoir in Bongor Basin is the weathering crust of Precambrain granite, and reservoir has complex lithology, poor physical properties and diverse types. In order to identify the main controlling factors of buried-hill weathering crust reservoir and establish evaluation criteria of weathering crust reservoir, the differences of lithologic mineral elements, the reservoir space type and fracture distribution characteristics were confirmed and the evaluation criteria of weathering crust reservoir could be established by defining the main controlling factors and matching with each other. The results show that lithology is the macroscopic background of reservoir, weathering and leaching is the basis of controlling reservoir pore development, and tectonism is an important factor affecting fracture formation. The granitic weathering crust reservoirs can be divided into three categories, of which the first type has the best reservoir performance and the third type is the worst. The proposed evaluation criteria of weathering crust reservoirs can provide more accurate guidance for the efficient exploration and development of weathering crust buried-hill reservoirs.