The invention discloses a plug device capable of opening and closing. The plug device comprises a pin module, wherein at least one fixing pin is fixed on the pin module; a first hinged shaft is arranged at the bottom end of the pin module; a first box body and a second box body are arranged on two sides of the pin module; a channel is arranged at the middle of the first box body; a movable pin corresponding to each fixing pin is arranged on the second box body; the movable pin is arranged into the following structure that the movable pin is positioned in the channel when the two box bodies are closed; when the two box bodies are opened, the movable pin turn and extends out of the channel and correspondingly forms a plug with the fixing pin. According to the plug device capable of opening and closing, disclosed by the invention, due to the adoption of hinge structures on the first box body and the second box body, and the channel arranged on the first box body and used for facilitating the turning of the movable pin, the size of the plug during folding is smaller, and the plug structure is simplified and durable during opening.