The utility model discloses a simulation experiment device for a temperature field of a high-speed railway tunnel in a cold region. The system comprises surrounding rock, a surrounding rock ground temperature control device, an air flow manufacturing mechanism, temperature testing sets and wind speed testing sets, the surrounding rock ground temperature control device is installed on the surrounding rock, the air flow manufacturing mechanism is fixedly arranged at the surrounding rock, and the temperature testing sets and the wind speed testing sets are installed in the surrounding rock. The device is used for researching the change rules of the radial and longitudinal temperature fields in the tunnel under different in-tunnel air temperatures, different surrounding rock ground temperatures, different in-tunnel wind speeds and different duration time lengths, provides a basis for cold-proof and heat-preservation design of the tunnel in the cold region, and has important theoretical significance and application value. The device has the advantages of wide application range, high reliability, high test precision, low construction cost and the like, and aims to further clarify the change rules of an air temperature field and surrounding rock radial and longitudinal temperature fields in the tunnel hole in the cold region.