Double-sided chamfering processing device

The utility model belongs to the technical field of machining tools, and discloses a double-sided chamfering machining device which comprises a pipe body, a blade bin is arranged in the pipe body, and a tool outlet hole is formed in the surface of the pipe body; the pneumatic mechanism reciprocates between a first position and a second position in the pipe body in the first direction; the blade is elastically connected with the inner wall of the blade bin and can reciprocate between a third position and a fourth position in the blade bin in the second direction, the second direction is perpendicular to the first direction, and the blade is matched with the pneumatic mechanism in an inclined face mode. The pneumatic mechanism can move from the first position to the second position and push the blade to move from the third position to the fourth position, and the blade extends out of the cutter hole when located at the fourth position. When the pipe body exhausts air, the pneumatic mechanism can move to the fir