The utility model discloses a threaded extrusion tap, in particular to a threaded extrusion tap with a circular top and a circular bottom, which comprises a tap main body. A tapping section is arranged at the front end of the tap main body, and tapping threads are disposed on the tapping section. The threaded extrusion tap is characterized in that the section of the tapping threads is wavy, crests and valleys of the wavy section are arc-shaped, the radius of each crest is R1, and the radius of each valley is R2. The end surface of the threads of the tap has a circular top and a circular bottom, accordingly, stress concentration points in an original structure are eliminated, stress is dispersed during machining, torque carried by the tap is decomposed, the difficult problem that an existing tap is easy to be adhered with materials and easy to be broken is solved, the service life of the tap is prolonged, and work efficiency is enhanced.