Abstract: In order to study the scattering process and the influence law of prefabricated fragments driven by focused warhead detonation, a numerical simulation method was proposed for the scattering characteristic analysis. Firstly, combining the existing experimental results, the accuracy of the numerical simulation method was verified. And then, the influence of the detonation method, charge generatrix shape, fragment geometry, charge-to-fragment mass ratio and fragment material on the scattering characteristics of focused warhead fragments was analyzed. The research results show that the charge generatrix shapes will significantly affect the fragment focusing effect. The change of the detonation end diameter can only change the axial focus zone position of the fragment during endpoint detonation, and has no obvious effect on the focusing effect. The geometric shape of the fragment will directly affect the stress state of the fragment in the detonation driving process, thereby affecting the fragment scattering effect. The number of fragments in the focusing zone is from high to low according to their shapes, sphere, prismatic shape and cylinder. The velocity of prismatic fragment is significantly higher than that of spherical and cylindrical fragments. In addition, the ratio of charge mass to fragment mass, and the fragment material can not only significantly affect the fragment velocity, but also have a certain impact on the fragment scattering angle. The larger the ratio of the charge mass to fragment mass, the smaller the scattering angle of the focused warhead fragment. In addition, the focusing effect of 93W material fragment is better than that of 45# steel material fragment. Considering the fragment velocity and scattering characteristics, the selection of prismatic fragments that match the charge generatrix shape will achieve the best damage effect.