Abstract: In order to determine the roof movement law and working face support resistance with large mining height, taking the 15101 working face as background, the mechanical model of stope roof was established to reasonably determinate support capacity. The roof movement laws of large mining height working face are studied through theoretical analysis and UDEC numerical simulation. The results show that the main roof formed “masonry beam” structure after the damage of roof with the constantly advance of working face. Under different mining height, the first weighting interval of working face increased with the increase of mining height. The roof stability was worse and the roof pressure increased. What’s more, the front abutment pressure increased and the peak forwarded. The strata pressure behaviors were more intense after the damage of roof. To be specific, the first roof weighting interval was about 35.12 m at 15101 working face, and the rated working resistance of support was 9 100 kN.