Based on the comprehensive analysis of acquired geophysical, geological and paleontological and isotope research data, authors suggest that the basement of Junggar basin is of continental crust property composed of Precambrian crystalline basement and Hercynian fold basement. Such “double” layer basement structure might be more practical and is comparable to that of those in U producing basins such as Yili, Turpan—Hami and Erdos typical uranium producing basin. It indicates that the Junggar basin posseses basic conditions for the metallogenesis of sandstone type uranium deposits to some extent.