Furnace tube leakage sampling tube dredging tool

The utility model provides a furnace tube leakage sampling tube dredging tool which comprises a working rod, and a working head is arranged at the front end of the working rod; an air inlet cavity is formed in the working rod, an air outlet cavity communicated with the air inlet cavity is formed in the working head, a plurality of air outlet holes communicated with the air outlet cavity are formed in the working head, the air outlet holes are obliquely formed relative to the axial direction of the working rod, and air outlets of the air outlet holes face the free end of the working head; an air inlet joint is arranged at one end of the working rod different from the working head; the working head comprises a head part and a tail part, the head part is conical, the diameter of the head part is gradually increased from one side of the free end to one side of the working rod, the tail part is cylindrical, and the outer diameter of the tail part is equal to the diameter of the maximum outer diameter part of the h