The influence of chip breaking groove structure on the cutting performance of integral end mill was studied by factorial test.The two cutters with different chip breaking groove distribution were selected, the milling cutter spindle speed, radial cutting depth and feed rate per tooth were selected as main factors,then the orthogonal milling experiment was established. The results show that the milling cutter with dense broken chip groove distribution is suitable for the parts with low precision requirements; the milling cutter with sparse broken chip groove distribution is suitable for parts with semi-finishing requirements;by the comparison and analysis of chip morphology and surface quality, it is found that by using the tool with sparse chip breaking groove, the better surface quality can be obtained when milling workpiece.