<p>In order to reduce CFRP pipes drilling damage and obtain the optimal range of sharp angles of the split-point drill for different diameter CFRP pipes, two dimensions of the ability of the cutting edge cut off fibers and the sharp corner resist breakage were considered. Then, two suitable sharp angles were selected for drilling experiments to verify, and the effects of sharp angle and helix angle on drilling quality were studied. Theoretical analysis has found that when the sharp angle is less than 90 °-arcsin (d₁/(2<i>R</i>)), the sharp corner of the drill bit has a good ability to cut off fibers. Experimental research has found that when the sharp angle is greater than 50 °, the sharp corner is less likely to break during the process of drilling CFRP pipes. Therefore, through theoretical analysis and experimental research, the optimization range of the sharp angle between 50 ° and 90 °-arcsin (d1/(2R)) was proposed for the first time, cleverly balancing the cutting ability of the cutting edge to cut fibers and the anti fracture performance of sharp corners. Taking into account the burr and tear damage on both convex and concave surfaces, drilling CFRP tubes (with an outer diameter of Ø25.5&#xa0;mm and an inner diameter of Ø20 mm) using a fish-tail drill with a 50° outer edge sharp angle and a 25° helix angle can achieve better hole quality. The theoretical and experimental research results of this article provide new ideas and methods for the development of CFRP pipe specific drill bits.</p>