Sampling hole sealing pad

The utility model provides a sampling hole sealing pad. The sampling hole sealing pad comprises a main pad and an auxiliary pad; a first through hole is formed in the main pad; wherein the first through hole is matched with a smoke gun inserted into the sampling hole, the main pad is provided with a first opening, the first opening is communicated with the first through hole, the main pad is sleeved on the smoke gun through the first opening and seals the first opening through the auxiliary pad, and the main pad is attached to the outer tangent plane of the sampling hole under the action of negative pressure in a flue so as to seal a gap between the smoke gun and the sampling hole. The utility model provides a sampling hole sealing pad. Under the action of negative pressure of the flue, the main pad can be tightly attached to the outer tangent plane of the sampling hole to achieve the sealing effect, time and labor are saved in the using process, air tightness can be improved, meanwhile, workers are liberated