A device for improving GIS on-site X-ray shooting efficiency includes a rigid connecting rod with one end connected with an X-ray machine and the other end connected with an imaging plate, wherein the middle section of the connecting rod as an arc-shaped pivot is arranged on the outer cylinder of the GIS; the X-ray machine ascends and descends to be linked with the imaging plate; the X-ray machine is arranged on a support ring supported by a threaded rod, the threaded rod is arranged on a base with a threaded hole, and the bottom end of the threaded rod is linked with an arranged motor rotating shaft; and a motor remote control module is arranged in the base. The invention has the benefits that by designing the device for improving GIS on-site X-ray shooting efficiency, the X-ray can be linked with the imaging plate through the remote control, so that the walking about of the operating staff and the adjusting of the instrument position are prevented between every two shooting, and the time for on-site GIS shooting is saved.