The invention relates to a method for removing an isolated node in a Mesh network. The method comprises the following steps: S1, separately sending, by all non-accessed sub node devices, the number ofsurrounding nodes through an information element in a management frame of a connection request; S2, determining, by a father node receiving the connection request, the sub node device as the isolatednode according to the number information of the surrounding nodes of the sub node device proposing the request; S3, disconnecting, by the father node receiving the connection request, the currently connected sub node device having the maximum number of surrounding nodes; and S4, receiving, by the father node receiving the connection request, the connection request of the sub node device proposingthe request. By adoption of the method provided by the invention, the isolated node in the Mesh network can be removed, so that the original isolated node find the corresponding father node connection to join the Mesh network.