Based on complexity of large dip angle of coal seam occurrence and mining conditions, overburden moving law and mining pressure behavior, in order to improve large dip angle coal seam mining and succession condition of goaf, large dip angle overburden strata movement and mine pressure behavior were studied. large dip angle of coal seam fully mechanized mining of Tuncheng Mining Industry was taken as study background, the original rock stress of roadway was tested by field measurement, the test technology was introduced and the monitoring result was analyzed, which provided reference for roadway support.