The utility model discloses a wiring lug extractor for a power transformer. The wiring lug extractor comprises a first hinge piece (1), a second hinge piece (2), a first support piece (3) and a screw rod (5); the first hinge piece (1) and the second hinge piece (2) are movably buckled and enclosed into a ring body adapting to the outside facade of a power transformer wiring lug (7); the first support piece (3) is fixed on the first flange piece (1); the screw rod (5) is in threaded transmission connection with the first support piece (3); when the screw rod (5) is screwed and rotated, the threaded end part of the screw rod (5) is propped against a wiring terminal (8) inside the wiring lug (7); the first hinge piece (1) and the second hinge piece (2), which are buckled together, tightly hug the wiring lug (7); and the wiring lug (7) is extracted from the wiring terminal (8) under the driving of the first support piece (3). The wiring lug extractor for the power transformer can efficiently and safely extract the wiring lug of the power transformer from the wiring terminal.