The utility model relates to a railway concrete roof beam people moving walkways's fatigue test device, include: the steel frame, it is door frame form, vertical fixing subaerial, fatigue testing machine, its vertical setting, the stiff end at fatigue testing machine top is fixed on the top beam of steel frame, and the frock is connected to the actuator of fatigue testing machine bottom, the frock, it is isosceles triangle form, vertical placing, isosceles triangle's top is equipped with the ring flange, and the actuator that the fatigue testing machine bottom is connected to the flange dish is passed through to the frock, isosceles triangle's base is equipped with the girder steel, and the both sides web symmetric connection of girder steel has a plurality of T steel, and people moving walkways's support correspondence is connected in the T steel, the bottom of girder steel is connected with ground limit structure. The utility model discloses furthest simulated the cantilever installthe people moving walkways that keeps off tiny fragments of stone, coal, etc. Wall side in the railway concrete roof beam the train through the time since from top to bottom the fatigue that arouses of vibration bear the state.