Abstract: In order to acquire the polarization information of target and background and improve the accuracy of detection for ground target, a spectral polarization imaging detection system was proposed, which could modulate the polarization state through revolving the polarizer and select spectra through revolving the filter so as to achieve spectral polarization imaging detection. An experiment was designed to validate the result of the polarization degree acquired from the system. The result shows that the system can reach the detection accuracy up to 4%. Additional, the detection experiment about the camouflage coating target which was under typical woodland background was conducted by the system. The result of image processing indicates that the target is prominent in the background, the polarization-s difference is up to 0.292 between target and soil,while 0.283 between target and grass.