Abstract: In order to improve the stability of sliding supports at caving coal working face and prevent gangue falling to hurt people, through the reasons analysis of the equipment stability, we propose the methods and measures that using adjusting angle at mining face, reducing support center of gravity, anchoring transport aircraft, installing scraper conveyor to block gangue to solve the problems of poor stability of equipment, no fixed object wounding people. Practical applications show that a series of effective measures ensure production safety of sliding support working face with large dip angle.