Embodiments of the present invention disclose a method and an apparatus for allocating an edge frequency band resource, and a base station, which relate to the field of mobile communications. The method includes: obtaining, through message interaction, usage information about an edge frequency band resource block of an adjacent mode; according to the usage information about the edge frequency band resource block of the adjacent mode and a characteristic resource block, determining an available edge frequency band resource block that is of the current mode and in a next adjustment period; and in the next adjustment period, allocating a determined available edge frequency band resource block of the current mode to each cell that is corresponding to the current mode. The apparatus includes a usage information obtaining module, a mode coordination module, and a resource locating module. In the embodiments of the present invention, by using a scheme of inter-mode interference coordination, potential interference with another cell is effectively avoided when independent negotiation for merely two cells or several cells is performed, so as to achieve a good effect of interference coordination, and furthermore, edge resources of cells are allocated reasonably, thereby effectively improving an overall throughput of a system and a throughput of users at cell edges.