Abstract: In some experiments about thermo-hydraulics, the problem using local resistance to simulate friction resistance is often meet. This paper choiced a special local resistance unit to calculate and analyse it’s performance for fluid resistance, got the characteristic and the parameters affection about the special local resistance unit; and explained the phenomenon by use of turbulence eddy dissipation epsilon of model κ-ε. It shows that the method uses special local resistance in series to simulate pipe fluid friction, to gain the same resistant characteristic closely, and to make the pipe shorter. So, the paper provides an efficient experimental technology support for thermo-hydraulics experiments.