This book introduces the geological background of sandstone-type uranium deposits in the Ordos Basin, Northwest China. Through comparative study of a large number of practical data such as uranium, coal and oil boreholes, the research system takes sedimentary basin as a unit and fully utilizes geological principles and test analysis to study the basic geological, geophysical, geochemical and remote sensing image characteristics of the basin, and to restores the favorable uranium-forming geological background brought by the change of the cognitive sedimentary environment conditions. It can be used as a reference for researchers, practitioners and as well as teachers and graduate students working in uranium deposit geology, sedimentary geology and related areas