In order to investigate the influencing factors of the pressing effect and safety of the shaped pillars, numerical simulation of the pressing process of the special-shaped charge with a loading diameter of D=88mm, a molding height of H=132mm, and a taper angle of α=60° was carried out by using the continuous medium dynamics method of 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 pillars, including the molding density and internal stress distribution, were studied systematically. The effects of process parameters such as pressing pressure, pressing rate, initial relative density, friction coefficient and holding time on the molding of pillars, including molding density and internal stress distribution, were systematically investigated. The results of the study show that the density and stress distribution inside the special-shaped charge are not uniform, and there are obvious density loose area and stress concentration area; the pressing pressure, the holding time, initial relative density and friction coefficient affect the molding density and stress distribution of the pillars at the same time, while the pressing pressure, the initial relative density and the pressing rate are the main factors affecting the stress concentration of the shaped pillars. When the pressing pressure is 300~350 MPa, the pressing rate is 1.5 mm?s-1, the initial relative density is 0.65, the friction coefficient is 0.15, and the holding time is 120s, the density distribution of the special-shaped charge is relatively uniform, and the difference of the stress gradient is small, which can improve the molding quality, reduce the stress concentration and avoid the cracks, and ensure the safety of the press fitting.