According to the observed data of two hailfall processes occured in the Mancheng county of Hebei Province during June 29, 1987, kinetic energy of hail-fall to the ground is preliminarily analysed in this paper.It is found that the, kinetic energy density (ET), the flux of kinetic energy (E), the mass .of hail (Mr) and the flux of mass (M) observed in the damaged areas are explicitly much higher than those of non-damaged areas.