The invention relates to a transformer test clamping system. The transformer test clamping system comprises a suspension rack used for being fixed at an arm portion of a lift truck, wherein an upper horizontal end face of the suspension rack is transversely fixed with more than one tri-axial manipulator mechanism with intervals, the X-axial manipulator mechanisms of the tri-axial manipulator mechanisms are respectively fixed on the upper horizontal end face of the suspension rack horizontally, end portions of the Z-axial manipulator mechanisms are respectively fixed with a clamping mechanism, and a main control unit used for controlling the tri-axial manipulator mechanisms and the clamping mechanisms are further comprised. The transformer test clamping system is advantaged in that the clamping mechanisms can be rapidly, accurately and freely adjusted in vertical and horizontal directions to effectively position the clamping position, and control is flexible and convenient.