The utility model discloses a reliability testing stand for a traction transmission system of a high-speed train frame-mounted bogie. The reliability testing stand comprises a test stand base (1), a power transmission assembly (2), a lifting device (3) and a bogie positioning device (5). The power transmission assembly (2) is arranged in the center of a basic platform (6) on the test stand base (1). A first lifting arm assembly (31) and a second lifting arm assembly (32) in the lifting device (3) are arranged in parallel on foundations on a left side and a right side of the basic platform (6). A first fixing bearer assembly (33) and a drive assembly (34) are disposed on a front end and a rear end of the basic platform (6). A first fixing crossbeam (29) and a second fixing crossbeam (30) are in fixed connection with a first transition longitudinal beam (35) and a second transition longitudinal beam (52) in the first lifting arm assembly (31) and the second lifting arm assembly (32). The bogie positioning device (5) is disposed on a top surface of two short groove walls in the test stand base (1). The reliability testing stand is capable of simulating actual conditions of real route running of the traction transmission system of the bogie.