The utility model discloses a clamping tooling tray used for an automatic calibration line of a mutual inductor. The clamping tooling tray used for the automatic calibration line of the mutual inductor comprises an insulating pedestal, a shell of which the top is equipped with a through hole is arranged on the insulating pedestal, and a transverse slide bar is arranged in the shell. Two sliding blocks with clamping mechanisms are arranged on the transverse slide bar slidably, and are equipped with the movable clamps used for clamping the neck of the mutual inductor, and the insulating pedestal is equipped with an opening for enabling a pneumatic claw in the automatic calibration line to stretch into the shell. By employing the technical scheme of the utility model that the movable clamps with the clamping mechanisms are added on the insulating pedestal to clamp the mutual inductor, the problem that the mutual inductor shakes or overturns during the transmission process is solved. The clamping tooling tray used for the automatic calibration line of the mutual inductor is simple in structure, is convenient to use, and is suitable for the automatic calibration line of the mutual inductor.