Large cross-section of Pingshang Mine transportation roadway was taken as the study object, in view of large cross-sectional roadway difficult to support, with plastic deformation and other issues, based on the actual situation of the roadway, a roadway stress model was created to get a different side pressure coefficient under the roadway stress law of change, the weak side of the roadway stress was analyzed, a large cross-sectional roadway level support scheme was given, which provided reference for the e roadway support with weak faces.