In the process of the emission of electromagnetic radiation,the surface features will show the polarization properties in relation to its nature.As the main material constituting the earth lithosphere,the rock′s thermal radiation also has its own polarization property,which is subject to many factors.To make a quantitative analysis of the influence of a single factor and the interaction of factors on the thermal radiation degree of polarization of the rock,it has made a three-factor and three-level orthogonal experimental design,using the thermal infrared radiometer to measure the thermal infrared degree of polarization of the rock samples,and using SPSS software for the experimental data processing.The results show that both the rock category and the detecting azimuth have a extremely significant impact on the thermal infrared degree of polarization of the rocks,and the interaction effects between the two have a significant impact on the thermal infrared degree of polarization of rocks.The detection zenith angle has some impact on the degree of polarization of rocks,but the interaction effects between the detection zenith angle and the rock category and the detecting azimuth do not affect the degree of polarization of rocks.The conclusions will provide an important basis for the further quantitative study of the thermal infrared polarization properties of rocks.