To save the calculating time and improve the precision of results,Dittus-Boelter criteria formula and Gnielinski criteria formula are adopted in the calculation of conjugate heat transfer analysis for the NASA-MarkII high pressure air-cooled gas turbine. Considering of the geometry and work conditions of inner-cooling channels,and by correcting the temperature difference coefficient and the entry effect coefficient,the commercial software CFX11. 0 is used to simulate NASA-MarkII high pressure air-cooled gas turbine by different turbulence models. The simulation results agree well with the experimental ones. In addition,because of the application of heat transfer coefficient criteria formulas,the calculation of inner-cooling channel fluid domain, the conjugate errors of inner-cooling channel fluid domain and the solid blade domain with different turbulence models and the calculation errors of uncertain inner-cooling channel turbulence characteristic boundary conditions,are all avoided.