The invention discloses a stable and reliable bearing polishing machine. The stable and reliable bearing polishing machine comprises a base, supporting columns, a sliding support, a hanging frame, a grinding wheel and a driving device. The supporting columns are arranged on the base. The sliding support is arranged on the supporting columns. The hanging frame is arranged on the sliding support. A rotating transmission mechanism is arranged on the sliding support. A transmission case and a hydraulic cylinder are arranged on the rotating transmission mechanism. A grinding wheel frame is arranged below the rotating transmission mechanism. The driving device is arranged on the hanging frame. A gearbox is connected to the output end of the driving device. The output end of the gearbox is connected with the transmission case. A driven gear matched with the hydraulic cylinder is arranged in the transmission case. A driving gear matched with the driven gear is arranged in the transmission case. A grinding cutter is composed of a grinding cutter base and a grinding disc, and a flange is arranged below the grinding cutter base in a connected mode. A connecting disc is arranged between the flange and the grinding disc. An elastic connecting device is arranged between the flange and the connecting disc.