Flow separation, which generates at back side of vane in axial cyclone causes increasement of pressure drop and deteriorates collection efficiency of particle which should be avoided for thermal efficiency of plant and environmental problem. On this research, axial cyclone is studied for enhancing swirling performance for collection efficiency by applying curved vane. Numerical method was performed by Ansys Fluent 17.2. On the results, average swirl number is increased when vane angle of flat and curved vane is same