A new swirling airflow finishing process is put forward mainly for hole surface. Flows field analysis is done through computational fluid dynamics (CFD) software. Abrasive velocity along axis length according to nozzle elevation and abrasive diameter are shown. Unthreaded hole is experimented on the basis of simulation. Experiment results are consistent with simulation research and it provides credible theoretic basis for process improvement. The successful application of this technology may meet deburring and finishing of complicated parts as crossed holes, stepped holes and winding pipe as well as unthreaded holes.