Abstract: Semi-metal friction material containing aluminum-silicon fiber was prepared. Effects of aluminum-silicon fiber content on fade, recovery and wear properties of semi-metal friction material were studied using DMS-150 friction tester. Morphologies of the wear surfaces were observed by scanning electron microscopy. Heat fading resistant property of friction material was improved obviously when the content of aluminum-silicon wool was more than 5wt. %, but at the mean time the property of recovery descended and wear rate increased lightly. The wear meehanism was adhesive wear for semi-metal friction material, while the wear mechanism for material with hybrid fiber was a mixing of adhesive and abrasive wear.