The invention relates to the technical field of electrical systems, in particular to a device for conveying testing tools of large power transformation equipment. The device comprises an upper part and a lower part. A narrow plate is arranged on the left side of the upper part, square holes are distributed inside the narrow plate, the narrow plate is connected with a middle wide plate through a transverse slope, holes are formed in the middle wide plate, the right side of the middle wide plate is connected to a long shaft through a vertical slope, and the right side of the long shaft is connected with a side plate. By means of the device, the devices such as a wire, a wire clamp and a small cable reel can be connected in a hung mode, the needed devices are conveyed to a box of the large power transformation equipment through a stretchable rod at the lower portion, the multiple testing devices can be conveyed at a time, and the device has the advantages of saving time and labor and being simple and reasonable in structure and easy to operate. Compared with the prior art, the guarantee of the operation safety of a tester is remarkably improved, and meanwhile the test working efficiency is obviously improved. The device is suitable for wide use and popularization in the electrical systems.