The invention provides a stress concentration zone fractured hole drilling and sealing device and a hole sealing method. The device comprises a seal hole pipe located in a drill hole; a pumping mining pipe is arranged in a penetrating mode in the seal hole pipe; a first seal blocking part and a second seal blocking part are arranged respectively on the outer hole of the seal hole pipe and in a peripheral direction on tube body circle of the inner mouth pipe body, a gas tightness seal blocking part is also arranged on the circumference of the part of the seal hole tube set between the first seal blocking part and the second seal blocking part. Compared with the existing technology, the hole sealing device is simple in structure, good in airtightness, and good in drainage effects.