The invention discloses a dynamic load testing device for a thin-wall bearing detecting table. The dynamic load testing device comprises vibration loading mechanisms, a thin-wall bearing clamping device and a rack. The vibration loading mechanisms are arranged at the two sides of the rack and are distributed in a bilateral symmetry mode. The thin-wall bearing clamping device is arranged between the vibration loading mechanisms and located in the rack. The rack comprises a base, a supporting base, a middle cushion block and an upper cover plate. Each vibration loading mechanism comprises a coupler, a cam transmission shaft, a supporting bearing, a cam gasket, a cam disc, a bearing installing base, an installing base fixing screw, a rolling bearing, a cam ejector rod, a strut, a strut pin, a pressurizing rod, a pressure adjusting bolt, a lock nut, a spring gland, a thrust augmentation spring, a loading gland, a sensor installing base and a pressure sensor. The thin-wall bearing clamping device comprises a thin-wall bearing, a power input shaft and a power output shaft. Performance of bearing external force of the flexible thin-wall bearing under different dynamic load and different rotating speed ratio working conditions can be tested.