To improve efficiency of procedure press-load detonator about large-caliber ammunition, the fighting part of a certain type large diameter pressure charging finite element simulation and experiment, according to characteristics of procedure press-load detonator establishment of large-diameter warheads for the step flow chart process, use the finite element simulation of ANSYS examine the charge process of wall of shell and detonating pipe by the force, conduct technology test setting down process parameters, using the appropriate parameters for the fighting part of the large-diameter high explosive procedure press-load. The results showed that: loading results meet the charge quality requirements of ×× large diameter warhead.