Radial polarized light has a polarization structure of axial symmetry, after passing by the high numerical aperture of converging lens, it is provided with a strong longitudinal electric field gradient and the ability to go beyond the diffraction limit, and the greater the electromagnetic field strength of light waves is, the higher the material power among the light waves is. A method with the use of POLARIZATION AXIS FINDER to generate radial polarized light was put forward. The quality of radial polarized light was tested by the detection device of polarized light. And the results show that by this way, the polarized light has the characteristics of high axial symmetry and well-proportioned distribution for each point along the direction of radial polarized light.