The present disclosure provides an eNB reconfiguration method, a UE and an eNB. The eNB reconfiguration method includes steps of: receiving, by a UE, from an MeNB an RRC reconfiguration message carrying an RRC reconfiguration parameter of an SeNB and an RRC reconfiguration parameter of the MeNB; when the RRC reconfiguration parameter of the MeNB is ignorable, not returning to the MeNB a message, or returning RRC reconfiguration result information of the SeNB to the MeNB; when RRC reconfiguration for the MeNB has been completed, returning to the MeNB an RRC reconfiguration success message carrying the RRC reconfiguration result information of the SeNB; and when an abnormality occurs during the RRC reconfiguration for the MeNB, initiating RRC reconstruction for the MeNB. According to the present disclosure, it is able to process RRC parameter parallel configuration for the SeNB.