Servo motor inertia testing device

The utility model belongs to the field of servo motor testing. In view of the problem that a tested motor is inconvenient to replace in an existing inertia testing device, the utility model discloses a servo motor inertia testing device which structurally comprises a workbench, and a first side plate and a second side plate are arranged on the two sides of the upper surface of the workbench; the bearing seat is arranged between the first side plate and the second side plate; the rotating shaft is arranged in the bearing of the bearing seat in a penetrating manner; the plurality of inertia discs are arranged on the rotating shaft; the output end of the auxiliary motor penetrates through the assembly hole of the first side plate and is coaxially connected with the rotating shaft; the clamping assembly is arranged on the second side plate and is used for clamping the tested motor; the second side plate is provided with two clamping seats which are symmetrically arranged on the two sides of the assembling hole of