Abstract: In order to determine end effect during the driving process of the open-off cut in Jushan Mine longwall working face, and by numerical simulation technology is used to establish longwall working face open-off cut three dimensional numerical model, the paper analyzes the open-off cut surrounding rock stress characteristics and displacement characteristics at different distance and different tunneling lengths, and accordingly determines the end effect. The results of the study show that there is end effect in the driving process of roadway section, the influence area of end effect under engineering conditions of this mine is at a distance of 10 m hehind the tunneling head, and the strong influence area is at the distance of 8 m behind the tunneling head. After the completion of the excavation, vertical stress distribution laws of open-off cut roadway's walls is small to big from the surface to the deep roadway surrounding rock, and transfers to the original rock stress state from big to small.