Anti-blocking and dredging device for underground drain hole

The utility model discloses an anti-blocking and dredging device for an underground drainage hole, and relates to the technical field of mine drainage. The anti-blocking and dredging device for the underground drainage hole comprises the drainage hole and further comprises an anchoring rib, a circular ring is welded to the bottom end of the drainage hole, a fixed pulley with a hook is arranged on the circular ring in a sleeved mode, a steel wire rope is wound on the fixed pulley with the hook, and the bottom end of the steel wire rope penetrates through the drainage hole and is connected with a punching steel ball. Compared with common mine drainage holes which are perforated by adopting a drilling machine with the same caliber mostly after being blocked, the anti-blocking and dredging device for the underground drainage holes is easier to operate, saves time, can effectively reduce constructors and cost input, has the characteristics of simple structure and convenience in construction, and has wide populariz