In order to solve the problems of large cutting force， fast tool wear and poor surface integrity of SiC_p/Al composites with high volume fraction of SiC in conventional machining， in this paper， the laser-induced oxidation assisted milling technology is studied for high volume SiC_p/Al materials. The loose oxide layer that is easy to remove is formed in the milling area by laser irradiation to improve the cutting performance. At the same time， the oxide layer control strategy and the milling parameter optimization process assisted by laser-induced oxidation are studied. The influence of auxiliary gas and different laser energy densities on the quality of oxide layer and the optimization of milling parameters are studied. The results show that with the increase of laser energy density， the width of heat affected zone and the depth of ablation groove increase. With the help of oxygen， it is easy to form loose and easy to remove oxide layer. The conclusion shows that with the aid of oxygen， a better oxidation effect can be obtained by selecting a higher laser energy density. With PCD diamond milling cutter， the spindle speed is 10 000 r/min and the feed rate per tooth is 7.5 μm/s can obtain the best surface quality.