Based on the current cooling method commonly used to cool outer surface by constant (i.e. low)pressure pipe jet and inner surface by high pressure axial jet, the numerical simulation by FEM software –FLUENT was performed to study temperature field of seamless steel pipe for quenching. The impact of the rotation speed is investigated on the steel pipe axial, circumferential and radial cooling uniformity. The numerical results reveal that, with the steel pipe speed increased, the rotation speed has a little influence on axial cooling uniformity and great impact on circumferential and radial cooling uniformity. Cooling uniformity of steel pipe is better under the condition of the rotation speed of no less than 60 rpm.