The invention relates to a communication management method, a data node device and a base station device for a wide-area internet of things. The communication management method comprises a login mechanism and a logout mechanism. The login mechanism comprises the following processes: a data node receives broadcast frames transmitted by each base station, determines a target base station with largest signal intensity and transmits a channel requesting instruction to the target base station; the target base station allocates a channel for the data node and transmits login information to a background; the background updates a background login table according to the login information, generates a login confirmation message and transmits the login confirmation message to the target base station; and the target base station stores the channel allocation information of the data node, and transmits the login confirmation message to the data node. The login mechanism of the wide-area internet of things is divided into three types. The method, the data node device and the base station device of the invention solve the first step work of networking of the wide-area internet of things, and lays a foundation for the work for completing the network architecture of the wide-area internet of things.