Abstract: The improvement methods and strength properties of scrap tire granular materials are the research basis on the frost resistance performance improvement of piles in cold regions. Several composite samples were made according to the mass ratio of rubber∶sand∶polyurethane = 3∶2∶1. The stress-strain curves of samples under different temperatures, confining pressures and number of freeze-thaw cycles were obtained by triaxial tests. The test results show that the stress-strain curve of rubber-sand-polyurethane composite has no obvious peak point, and has obvious strain hardening characteristic. The failure strength of the sample increases with the decrease of temperature, and increases by 15.0% when the test temperature decreases by 5.0℃ for frozen samples. The failure strength values of samples decrease with the increase of freeze-thaw cycles, but the average decrease is less than 5.0%. The effect of confining pressures on the failure strength of the 20.0℃ sample is about 15.0%, while that of the frozen samples is less than 5.0%. The sensitivity analysis shows that the temperature has the greatest impact on the failure strength of rubber-sand-polyurethane composites, while the confining pressure and the number of freeze-thaw cycles have little effect. The rubber-sand-polyurethane composites have the characteristics of moderate strength, stable structure and freeze-thaw resistance. The stress-strain constitutive model of rubber-sand-polyurethane composite after consideration of the temperature, confining pressure and freeze-thaw cycle was established, and the rationality of the model parameters fitting formula was verified.