The coalbearing strata distributed in Baoligentaohai, Zhengxiangbaiqi, Inner Mongolia， were considered to be the Lower Cretaceous Bayanhua Formation and lie unconformably on the Upper Jurassic Zhangjiakou Formation. A comprehensive analysis on the bed succession, lithological character, palynolgical evidence and seismic wave set based on the recent prospecting, seismic and palynological data demonstrate that the coalbearing strata are acturely the Lower—Middle Jurassc sequence, which are overlain by the Upper Jurassic Zhangjiakou Formation and can be correlated with the Hongqi and Wanbao Formations in south—central Da Hinggan Mountains，the Alatanheli Group in the Eren district and the Xiahuayuan Formation in northern Hebei.