Spectral polarization imaging technology is a novel optical imaging technique that not only enhances the amount of information acquired from targets， but also reduces background noise， which can capture target details and detect disguised targets. This paper presents a spectro-polarimetric device by integrating subwavelength gratings with Fabry-Perot （F-P） filter， which can obtain ultra-high spectral resolution and polarization extinction ratio with high control flexibly on both spectrum and polarization. A spectro-polarimetric filter （SPF） has been designed to obtain 4 spectral channels of stokes parameters simultaneously. Simulation results show that it has a spectral resolution （SR， ） of 217 and a polarization extinction ratio （PER） of . The polarization extinction ratio of subwavelength grating is measured to be over 500 PER with 90% transmission efficiency. The spectral resolution of all-dielectric F-P filter is measured to be 30 with 60% transmission efficiency in the long wave infrared band. The designed method is universal and can be used in a wide range of wavelength bands such as visible， infrared， and even terahertz. It has great potential applications in fields such as micro-polarization spectrometers and full-stokes polarization detection， benefiting from these advantages.