In order to advance our understanding on the temporal and spatial distribution law of red beds in the world and their differences in geomorphic development, a comparative study was conducted on the distribution, age, geological setting, paleogeographic environment, lithology, and geomorphic features of red beds in and outside China. It reveals that red beds in China are mainly distributed in southeast, southwest, and northwest China. They were mainly deposited in the Mesozoic Era, especially in Cretaceous. ...