Abstract：Experimental studies are made on the creep properties of rock salt after undergoing different high temperatures；the effect of stress level and temperature on creep of rock salt is analyzed. Through the creep characteristic curves and parameters，the steady state creep strain rate constitutive equation of rock salt is obtained by regression. The results indicate that the effects of deviatoric stress and temperature on the steady state creep strain rate of rock salt are obvious. The steady state creep strain rate is a power function of deviatoric stress and exponential function of temperature and energy. Based on the relation of creep modulus and creep time for rock salt，the creep damage evolution and creep damage constitutive equation are established.
