Combining with the practice of Laohutai coal mine in Fushun,the numerical simulation on fault impact ground pressure in deep roadway was made.The results of numerical simulation indicated that with the excavation approaching the fault,the stress at the fault became higher;with the stress accumulating and being up to the ultimate strength of coal,the elastic energy accumulated in coal released in ejecting way and so on,consequently resulting in fault impact ground pressure.Through the study on the the mechanism and characteristics of fault impact ground pressure in Laohutai coal mine,some measures to prevent and control fault impact ground pressure were put forward.