The effect of thermal load in the creep feed grinding have important effect on the surface quality for ma? chining the tenon teeth of turbine blade. In this paper，the effects of grinding parameters on grinding forces and temperature in grinding DD5 single crystal alloy are investigated by experiments. The influences and formation mechanism of DD5 creep-feed grinding forces and temperatures are analyzed，and a mapping model between thermodynamic effect and grinding parameters is established and verified. The experimental results show that the grinding depth has the greatest influence on the DD5 creep-feed grinding force and temperature，following by the grinding wheel speed，and the feed velocity of work-piece has less influence on the grinding forces and temperature. With the increase of the grinding wheel speed，the grinding force is decreasing，and the grinding temperature has an in?creasing trend. With the increase of feed velocity and grinding depth，both the grinding force and temperature are of increasing trends. Increasing the feed velocity and reducing the grinding depth on the premise of satisfying the material removal rate can avoid the larger grinding thermodynamic coupling layer on the DD5 grinding surface.