Abstract: Aiming at the measurement of kinetic energy for flying fragments, a measuring method of kinetic energy for the flying fragment using single screen was presented. Two screens were used to measure the speed of the flying fragment in the method, the volume information was got by mean of the output waveform of the fragment passing through the screen, further the quality and the kinetic energy of the fragment were obtained. This paper analyzed a theoretical model of the relationship between the output waveform of the screen and the volume of the fragment. Three typical rotational symmetry objects simulations were used to verify the theoretical model, and a calibrating method was studied. The testing result of the ball firing proved that the proposed method could measure the kinetic energy of the rotational symmetry projectile or fragment, the measurement precision satisfied the requirement of the range test.