The invention discloses a connector used for a transformer test. The connector comprises a short-circuit wire and a plurality of clamping units connected on the short-circuit wire. Each clamping unitcomprises a positioning frame, a supporting base is arranged on one side of the positioning frame, the other side of the positioning frame is provided with a driving device at a position correspondingto the supporting base, the supporting base is hinged with left and right arc-shaped clamping sleeves which are arranged oppositely, the driving device is hinged with left and right arc-shaped clamping rods which are arranged oppositely, each clamping rod can be inserted in the clamping sleeve at the corresponding side in a movable manner, the driving device has a clamping state and a release state, when the driving device is in the release state, the clamping sleeves on the left and right sides are positioned on the same arc; and when the driving device drives the clamping rods to extend into the clamping sleeves inwardly, the driving device is in the clamping state. The connector can effectively increase the speed and efficiency of short circuit, and can effectively improve the accuracyand test precision of transformer tests.