Abstract: To explore the adaptability of polyurethane (PU) solidified ballast bed at different ambient temperatures, the effect of temperature on the tensile, adhesive and mechanical properties of PU solidifying system were investigated. The results indicated that the tensile modulus, tensile strength, and cohesive strength of the PU-solidified material increased gradually with a decrease of ambient temperature from -60 ℃ to 70 ℃. The breakage occurred in the middle point of tensile bar. The glass transition temperature (Tg) was about -50 ℃. The loss factor of the solidified material at the ambient temperature is close to Tg is higher than that at the other ambient temperatures, and the deformation performance is also better around Tg. The PU solidifying system presented more excellent performance under a low-temperature environment. The Tg of the solidified material decreased with an increase of molecular weight of polyether polyol. This type of PU-solidified material could be used in different temperature environments. On the other hand, the high molecular-weight polyether polyols are more suitable for the use of PU solidified ballast bed under a low-temperature environment.