Anti-loosening device for battery plug

The utility model relates to the technical field of battery plugs, and discloses an anti-loosening device for a battery plug. The battery cover is used for preventing a battery plug from loosening when the battery plug is inserted into a battery and a battery cover and comprises the battery cover, a limiting support and a connecting piece, the inner side of the battery cover is connected with the limiting support through the connecting piece, and the limiting support is used for limiting the position of the battery plug inserted into the battery cover. The battery plug and the battery cover matched with the battery plug are reasonably designed, and the battery cover, the limiting bracket and the connecting piece are adopted, so that the limiting bracket can be effectively assembled on the battery cover and a small distance is reserved between the limiting bracket and the battery plug, and the distance ensures that the plug cannot be powered off after being slightly moved; and interference and clamping stagnat