The　strata　overlying　the　Paleozoic　strata　in　the　Bainaimiao　area　are　approved　as　the　Halahuogete　and　Baiyinbaolage　Formations　of　the　Meso-Neoproterozoic　Baiyun　Obo　Group　by　stratigraphic　correlation.　Based　on　detailed　field　observation　and　structural　section　measurment,　the　Baiyun　Obo　Group　is　suggested　to　be　a　thrust　nappes　formed　by　thrust　slippage　from　the　northern　margin　of　North　China　craton　in　the　south　to　the　Bainaimiao　arc　chain　in　the　north,　known　as　the　Bainaimiao　thrust　tectonics.　The　contact　correlation　and　formation　age　of　the　thrust　fault,　upper　plate　(i.e.　thrust　nappe　and　klippes)　and　lower　plate　(i.e.　Paleozoic　strata　and　pluton)　suggest　the　thrust　nappe　sliding　to　NNW　for　7-15　km　during　Late　Permian　to　Early　Trias　as　an　epicontinental　response　of　continent　to　continent　collision　after　the　closure　of　the　paleo-Asian　ocean.　And　the　discovery　and　research　of　the　thrust　nappe　are　significant　to　the　research　of　the　evolution　of　the　continent-to-continent　collision　in　Bainaimiao　area.