The aulacogen,postaulacogen depression and depression took place successively during the Early ProterozoicLate Palaeozoic in the western margin of the North China PlatformThe present paper deals with in detail the relationship between the coalaccumulating process and the Late Palaeozoic marine transgressionregression on the basis of the superregional stratigraphic correlation and detailed analysis of sedimentary environmentsThe results of the study show that there were major areas of tidal flat deposition and delta deposition during the late Late Carboniferousearly Early Permian on the western margin of the North China PlatformThe sedimentary environments are characterized by difference between the east and west,and by zonation from the north to south in spatial distributionThey changed gradually from lagoonal tidal flat to river controlled lagoonal delta and again to river controlled littoral delta affected by tidal action in the westThe sedimentary environment of tidal flat occurred in the east The sedimentary environment of near mountain littoral plain also occurred in the eastern margin Four times of secondorder marine transgressionregression occurred during the early Late Carboniferousearly Early Permian in the study area, of which the third and fourth secondorder marine transgressions developed all over this areaThe third secondorder marine transgression occurring at the beginning of early Early Permian marks the maximun transgression period and before its arrival,ie at the end of the late Late Carboniferous there was the best developed period of the coal seams in the superregionThe depositional areas of lagoonal delta plain peat swamp,terrigenous supratidal peat flat and terrigenous supratidal peat swamp were the best place of the coalaccumulating process