The invention belongs to the application optical field, and in particular relates to a generating device for radial polarized light applied to the optical tweezer technology particle capturing, surper resolution microscope, laser processing, and optical information storage. The generating device for radial polarized light comprises a first optical fiber, a second optical fiber, a single-mode laser light source, a polarizer, a first optical power coupler, a third optical fiber, a fourth optical fiber, a first optical fiber polarization state modulator and a second optical fiber polarization state modulator, a second optical power coupler, a fifth optical fiber and an imaging device. The generating device for radial polarized light is the all-fiber device, one beam of light with LP11 mode is stimulated, the light with LP11 mode is divided into two paths through the optical coupler for modulating the polarization state respectively, two paths of light with LP11 mode can be overlapped through the optical coupler, the optical fiber pattern theory and the coupling theory are combined and the space optical path system is not built, and the polarization controller is controlled for generating the polarized light different in vector.