The utility model discloses a lifting device for a gate leakage detecting device. The lifting device for the gate leakage detecting device is characterized by comprising a driving wheel (1), a driven wheel (2), a clamping motor (3), a lifting motor (4), a lifting pole (5) and a control module (6). The clamping motor (3) and the lifting motor (4) are installed in the control module (6). The driving wheel (1) is connected with the output end of the lifting motor (4). The output end of the clamping motor (3) is connected with a rotating shaft of the driven wheel (2). The lifting pole (5) is installed between the driving wheel (1) and the driven wheel (2). A signal acquisition module (7) is installed at the lower end of the lifting pole (5). The lifting device for the gate leakage detecting device has the advantages of flexible movement, accurate locating and reliable performance. The lifting device for the gate leakage detecting device further has the advantage of adopting mechanical automatic operation to enable the lifting device to be simple and convenient to operate with high working efficiency, thereby effectively satisfying the lifting requirement of the gate leakage detecting device and facilitating popularization and application of the gate leakage detecting device.