The invention discloses a hard switch method in border areas, which comprises the following steps: judging whether the preset first switch condition is satisfied when a mobile terminal at a basic frequency in the border cell of the first Base Station Controller (BSC) moves from the first to the second BSC of border cell coverage area at the basic frequency. If satisfied, the pilot frequency hard switch is performed in the cell, the mobile terminal is switched to a transition frequency which the basic frequency is different from the frequency provided in the first BSC, and the coverage of the transition frequency is at least larger than that of the basic frequency of the first BSC border cell. The invention further discloses a method for hard switch in the border area and the BSC which enables the switch in the border area. The invention employs the wide coverage characteristic of the transition frequency, and avoids 'clashing' hard switch in the switch area as well as the instable rate for successful switch.