Blast hole sealing plug

The utility model discloses a blast hole sealing plug which comprises a closed cavity; the closed cavity is made of rubber and comprises an oval plug head and a horn-shaped plug tail; and the tail end of the plug tail is buckled with a pipe orifice of an air pump, and the air pump is used for inflation for the plug head through the plug tail, so that the rubber plug head is expanded. The blast hole sealing plug of the utility model solves the problem of hard extrusion damage of the blasting fuse when the blast hole is blocked, has a simple structure, is easy to process, is convenient to carry and is low in cost.