An in-vehicle charging control device may comprise a control module, a charging socket, and a switching circuit. The charging socket has a charging connection confirming terminal (CC) and a protective grounding terminal (PE). The switching circuit is connected with the charging connection confirming terminal (CC) and the protective grounding terminal (PE) of the charging socket. The control module is connected with an in-vehicle battery via the switching circuit. The charging socket matches with a charging plug. The switching circuit is in a conducting state when the charging plug is plugged in the charging socket and in a disconnection state when the charging plug is not plugged in the charging socket.