The utility model relates to an experimental auxiliary stand of automatic distribution circuit breaker in vacuum, including supporting chassis, insulator spindle, mount, fixed knot, wheel, handle, the welding has three insulator spindle on supporting the chassis, be equipped with the mount on the insulator spindle, the mount passes through bolted connection with three fixed knot respectively, and fixed knot is used for fixed T to work a telephone switchboard, one side of bracing piece is equipped with two wheels, and the opposite side is equipped with the handle. The utility model discloses can be with automatic effectual the fixing of T wiring of joining in marriage the circuit breaker both sides in vacuum, guaranteed the T wiring the looks interval and to the ground distance, experimental measurement accuracy has been improved and prevented effectively that the insulating layer of T wiring in the process of the test from being destroyed, equipment and personnel's factor of safety has been improved in the process of the test.