Super-large bearing running test machine tool

The invention relates to a super-large bearing running test machine tool which is characterized by comprising a bracket (11), wherein an upper cover plate (8) is arranged on the bracket (11); a lengthened spindle (2) vertical to the upper cover plate (8) is arranged on the upper cover plate (8); the lower end of the lengthened spindle (2) is in transmission connection with a speed regulation motor (14) sequentially by a transmission mechanism and a speed reducer (13); the upper end of the lengthened spindle (2) is fixedly provided with a power transmission arm (3); the power transmission arm (3) is connected with a dead ring (9) by an adjustable telescoping mechanism; a torque sensor is arranged on the lengthened spindle (2); the torque sensor is connected with a display by a microprocessor; and a diameter regulation positioning mechanism (7) is also arranged outside the dead ring (9) on the upper cover plate (8). After the super-large bearing running test machine tool disclosed by the invention is adopted, the running condition of a super-large bearing can be mastered at any time and test data is provided for improvement on the super-large bearing.