The invention relates to a numerical control servo machining system for gas separation pipes of a combustor. The numerical control servo machining system comprises a base, a rotating disc, a drillingmechanism, a tapping mechanism, a plane milling mechanism and a deburring mechanism, wherein the drilling mechanism, the tapping mechanism, the plane milling mechanism and the deburring mechanism aresequentially arranged around the rotating disc. The machining system further comprises a chain plate line mechanism and a mechanical arm mechanism. Clamps used for fixing and clamping workpieces are arranged on the rotating disc. During work, the machining system is controlled by a PLC, the mechanical arm mechanism conveys workpieces conveyed by the chain plate line mechanism to the clamps of therotating disc, after clamping and leveling are completed, the rotating disc rotates in sequence, the workpieces are conveyed to stations of the drilling mechanism, the tapping mechanism, the plane milling mechanism and the deburring mechanism, and drilling, tapping, large hole drilling, spot facing and deburring are completed in sequence. Compared with the prior art, the machining time of the machining system is shortened by 8 min / workpiece compared with the original machining time, product quality is improved, power is greatly reduced, and the labor intensity of workers is relieved.