Abstract: Stegosaurus is a medium-and large-class dinosaur with bony plates, the most obvious of which is the bizarre array of dermal plates and spines that extends along the body from the neck to the end of the tail. The earliest stegosaurus are known from the Middle Jurassic of Europe and China and they achieved a global distribution by the Late Jurassic, but subsequently waned in diversity during the Early Cretaceous. Fossils of stegosaurs in China include 9 main genera:Huayangosaurus, Tuojiangosaurus, Gigantspinosaurus, Chungkingosaurus, Chialingosaurus, Yingshanosaurus, Monkonosaurus, Jiangjunnosaurus, Wuerhosaurus. According to the characteristics of head, girdle, limb ratio and bone plate, Stegosaurus of China should have an evolutionary process from Huayangosaurus-Chungkingosaurus-Gigantspinosaurus-Tuojiangosaurus-Yingshanosaurus-Monkonosaurus-Wuerhosaurus.