Objectives: The Beipiao Formation is major Jurassic coal-bearing stratum in Western Liaoning. Most scholars believe that the Beipiao Formation is belonged to the Early Jurassic and can be correlated with Yaopo, Yongdingzhuang, Fuxian and Sangonghe Formation. But we think there are contradictions in the conclusions, so this article attempts to solve the above problems. Methods: Based on the comprehensive analysis about the stratigraphic sequence, lithology, tectonic evolution and paleoclimate evolution, we discuss the geologic age and regional correlation about the Beipiao Formation. Results: We think that the Beipiao Formation is the coal-bearing basin deposits between the earlymiddle period of Early Jurassic Xinglonggou Formation erupted in the crustal extension stage after indosinian and the middlelate perod of Middle Jurassic Haifanggou, Lanqi Formation erupted in Yanshanian. The former volcanic activity formed Nandaling Formation in Northern Hebei and Western Beijing, volcanic rock interlayer in part of Northern Sinkiang; The latter volcanic activity formed JiulongshanTiaojishan Formation in Northern Hebei and Western Beijing, YungangTianchihe Formation in Northern Shanxi, Toutunhe Formation in Northern Sinkiang. At the bottom of Beipiao Formation is motley and there are not more fossils,low organic matter,and the climate was relatively dry. The plant fossils and sporopollen in Beipiao(above the motley part),Haifanggou, Lanqi Formation prove that the ancient climate evolved from humid cool to dry heat gradually. The characteristic is same to the Northern China and the global in Jurassic. Conclusions: The motley stratum at the bottom of Beipiao Formation belongs to the late Early Jurassic and can be correlated with Sangonghe, Fuxian, Yongdingzhuang, Yangjuan Formation and the basal bed of Yaopo Formation; Beipiao Formation (above the motley part) belongs to the early Middle Jurassic and can be correlated with Xishanyao, Yanan, Datong, Xiahuayuan Formation and Yaopo (above the K1 sandstone) Formation.