The main arterial blood supply to the retroauricular region came from the posterior auricular artery. At the level of mastoid, the caliber of the artery was measured at 1mm in diameter, The posterior auricular vein drained into the external jugular vein. Vascularized retroauricular skin flap was used to repair 2 cases of partial nose defects with success and the outer appearance of the nose was quite satisfactory. The applied anatomy and the surgical procedure were detailed.