Objectives: Predecessors have different conclusions on the age and tectonic setting of the Badangshan volcanics, which restricted the understanding the tectonic evolution of the middle segment of the northern margin of the North China Craton. The study of Badangshan rhyolite also contributes to the closure age of Paleo- Asian ocean. Methods:Based on the field work, through the microscope observation, the whole rock chemical analysis, the Hf isotopic analysis and SHRIMP U- Pb zircon ages of the original Silurian Badangshan rhyolite from Chaoyanggoucun area in northern Chifeng City of Inner Mongolia on the northern margin of the North China Craton. Results: The dating results reveals that the rhyolite were formed in Early Permian (277. 3±3. 3Ma). The rhyolite belongs to high potassium calc- alkaline series characterized by high SiO2 (75. 24%~76. 07%), variable K2O (1. 68%~4. 01%) and Na2O (2. 23%~5. 02%). The rocks are characterized by high Al2O3 (12. 92%~13. 28%) and lower CaO (0. 13%~0. 47%) with the aluminum saturation index (A/CNK) being 0. 99~1. 06. Chemically, they belong metaluminous to weakly peraluminous volcanic rocks. Zircon εHf(t) values are negative (-10. 7~ -16. 1) and two stage model age (TDM2) are from 1736 to 2016Ma, indicating that the rhyolite originated from partial melting of the ancient materials of the North China Craton. Conclusions: A synthetic study of the geochemical characteristics of the Badangshan intermediate—acid volcanic rocks in Chaoyanggoucun area and the regional geological data reveals that the volcanic rocks formed in the setting of Andean marginal arc resulted from Paleo- Asian ocean subducting southward under the northern margin of the North China Craton which including the northern North China Craton and Bainaimiao arc belt. The rhyolite originated from partial melting of the ancient crustal materials of the North China Craton based on the geochemistry feature and zircon Lu—Hf isotopic results.