Abstract: In order to explore the influence of thermodynamic theory on the cooling characteristics of vortex tube control used to create artificial environment in mine, based on the first and second laws of thermodynamics are adopted to analyze the thermodynamic characteristics of fluid in vortex tube, the energy separation mechanism are explored, and the refrigeration characteristics are obtained. Using the three-dimensional fluid domain coupling method, the continuous-discontinuous model is established. Through the calculation of different mathematical models and different calculation methods, it is compared with the experimental results of Aljuwayhel. With the difference of refrigeration effect as the judgment index, the separation of pressure and velocity coupling variables is determined using the SIMPLEC algorithm. The anisotropic Reynolds stress RSM turbulence model is the most accurate, and the deviation of refrigeration effect is calculated within 12%. The analysis of the flow field in the vortex tube shows that the distribution of fluid velocity, fluid pressure and temperature flow field in the tube is basically consistent with the theory based on thermodynamic design. The simulation conclusion that the static temperature change caused by fluid temperature separation in the tube is caused by fluid heat and work conversion verifies the energy transfer process in the vortextube.