In order to research flying situation of preformed fragment by explosive drive, damage elements were made concentratedly fly towards the given direction and form gain partition of damage elements, to enhance lethal power in presumptive area On the platform of a certain type of rocket warhead, the directional warhead structure with combination of explosive column and tungsten ball was designed. Numerical simulations of the power of explosion driving preforned fragment warhead were made by LS-DYNA, and the speed and spatial distribution law of tungsten ball was got. Testing program was designed and range test was conducted. Compared with the simulation results, the proof is basically the same and provides reference for directioal warhead design and simulation.