In order to investigate the influencing factors of the pressing effect and safety of the irregular-shaped charges， numerical simulation of the pressing process of the irregular-shaped JH-2 charge， with a diameter of D=88 mm， a molding height of H=132 mm， and a wedge angle of α=60°， was carried out by using the dynamics of continuous media method in the Marc finite element software， and the effects of process parameters such as pressing pressure， pressing rate， initial relative density， friction coefficient， and holding time on the forming of the charges， including the molding density and internal stress， were studied systematically. The results show that the density and stress distributions inside the irregular-shaped charge are nonuniform， and there are obvious regions of density loose and stress concentration. The pressing pressure， initial relative density， holding time and friction coefficient affect the molding density and stress distribution of charges simultaneously， while the pressing pressure， initial relative density and pressing rate are the main factors affecting the stress concentration of the irregular-shaped charge. In view of this irregular-shaped structure， when the pressing pressure is 300-350 MPa， pressing rate is 1.5 mm·s^-1， initial relative density is 0.65， friction coefficient is 0.15， and holding time is 120 s， the density distribution of the irregular-shaped charge is relatively uniform， and the stress gradient difference is small， which can improve the molding quality， reduce the stress concentration and avoid cracks， and ensure the charging safety.