Abstract: Based on the investigation of dinosaur egg fossils sites in Yudu Basin, by studying the occurrence lithology of fossils and measured stratigraphic sections, the paper confirmes that the dinosaur egg fossils are concentrated in the Late Cretaceous Zhoutian Formation, analyzes the distribution characteristics of egg fossils in the plane and columnar sections, and then discusses the lakeside-shallow lake facies sedimentary environment where dinosaurs laid eggs and autochthonous-parautochthonous burial environment of egg fossils combined with the characteristics of species, shape, number and lithologic member of unearthed fossils, which provides actual data for further study of evolution law and paleoenvironment of basins.