Vortex tube can replace choke vale to reduce well head pressure without heating and chemical injection.However, due to the complexity of energy separation mechanism,the reliable prediction model is still a challenge.The Realizable turbulence model was used to simulate the velocity and temperature distribution of the vortex tube with four inlet channels.The numerical results demonstrated that there exist two part of swirling flow inside the vortex tube:the inner flow with positive axial velocity and the outer flow with negative velocityand a zero-velocity profile is located between them.Significant energy separation is observed due to the effect of secondary flow.Compared with throttle valve, the temperature drop is much lower due to heating effect of the vortex tube. It can be used in gas station to replace throttle valve for hydrate control.