Abstract: The horsehead is the throat part of the mine, and the rupture of the shaft wall of the horsehead is likely to cause serious damage if it is not repaired in time. It is difficult to repair the fracture of the horsehead in the fully frozen soft rock shaft, and the traditional method of reinforcing the steel well ring is not applicable any more. To solve the problem of repairing the wall of horsehead, according to the actual geological engineering conditions and rupture situation, we analyze the failure mechanism of shaft lining of horsehead; combined with borehole stress, we develop armor support technology which is suitable for the repair of the shaft in the horsehead, and make a reasonable design plan for the repair.