In this paper, we report on the dynamic cutting resistance of coated paperboard and the impact force on a blade tip during the pushing shear process. The cutting force on a blade was measured using a strain gauge by varying the rotation velocity N_C of the crankshaft that controls the vertical motion of the blade. The transient cutting force of the blade was investigated in terms of the maximum cutting resistance ƒ_Cmax, and the dynamic peak force ƒ_Dmax after breaking down. As a result of the experiment, the impact factor υ_m=ƒ_Dmax/ƒ_Cmax of the cutting force was shown to be a function of N_C, and the velocity dependency of the cutting resistance was found at the pushing stage. Furthermore, the release of the compressive elastic energy of the paperboard during the breakdown was discussed in relation to the variance of the dynamic cutting force.