Safety plug-in buckle of rotary overhead working truck

The utility model relates to a safety buckle of a rotary overhead working truck, which comprises a socket and a plug, the plug comprises a plug main body and a connecting part connected with the plug main body, one end of the connecting part far away from the plug main body is symmetrically provided with stop parts, the socket is internally provided with a jack and a mounting hole, and the plug main body is connected with the plug main body. The jack is communicated with the surface of the socket and the mounting hole, an elastic piece, a detection element and a limiting plate are arranged in the mounting hole, the limiting plate is arranged close to the jack, one end of the elastic piece abuts against the detection end of the detection element, the other end of the elastic piece is connected with the limiting plate, and the shape of the jack is matched with the shape of the end, provided with the stop part, of the plug. The end, provided with the stop part, of the plug penetrates through the jack to be inser