Hot-line work air charging system

The utility model discloses a hot-line work air charging system which comprises an extending air inflation guide tube arranged outside of a box body, and the extending air inflation guide tube is connected with an air inflation guide tube in the box body, and an air inflation port of the extending air inflation guide tube is provided with a sealing device. The hot-line work air charging system provided by the utility model utilizes the extending air inflation guide tube to be connected with the air inflation guide tube in the box body, thus, air inflation can be directly carried out outside via the extending air inflation guide tube without powering off or opening a box door; and as the air inflation port of the extending air inflation guide tube is provided with the sealing device, and the sealing device is closed after inflation is finished, the deflation is prevented, and the sealing device is opened again when the next time of inflation is performed, thereby being convenient and rapid.