The invention discloses a full-automatic paying-off and taking-up device of electrical test cables and belongs to cable paying-off and taking-up devices. The full-automatic paying-off and taking-up device of the electrical test cables structurally comprises a machine frame, a cable reel, a cable reel rotation driving device and a cable adjusting device. The cable reel, the cable reel rotation driving device and the cable adjusting device are arranged on the machine frame. The cable reel and the cable adjusting device are connected with the cable reel rotation driving device. The cable adjusting device is arranged on the front side of the cable reel. Compared with the prior art, the full-automatic paying-off and taking-up device of the electrical test cables has the advantages that the electrical test cables are taken up and paid off in a full-automatic manner, the cable paying-off and taking-up workload of workers is lightened, the cable paying-off and taking-up work difficulty is lowered, and therefore the full-automatic paying-off and taking-up device of the electrical test cables has good application and popularization value.