Abstract: Using the high speed cam plastomatry the cylindrical samples with th concave at butt end, filled with glass powders which has different melting poing as lubricate, are pressed. Under the following conditions,deformation temperature is 850 to 1150℃, rate of deformation is 5 to 80 s-1,amount of deformation(Ln(h₀/h₁)) is 0 to 0.693,the experiments for four kinds of alloy structure steels are taken place. The results show that they not only give the calculating diagram of resistance to deformation, but compare two kinds of curve fitting, finally,a mathematical modle that is higher fitting precision for resistance to deformation is presented