Embodiments of the present invention provide a method for converting mobile allocation and an upper control node of a base station. The method for converting mobile allocation includes: determining that at least one cell in cells controlled by an upper control node of a base station requires mobile allocation (MA) conversion; and instructing a base station to which the at least one cell belongs to convert, according to a time slot cluster, an MA occupied by a time slot of the at least one cell, where the time slot cluster is formed by the same time slots on different carrier frequencies. The embodiments of the invention may implement dynamic MA conversion according to actual conditions of a network, thereby guaranteeing the performance of the network, and improving the calling experience of users.