In order to study the influence of pressing density on impact safety, some explosive charges with different densities were pressed utilizing A-Ⅸ-Ⅱ explosive, composition B, and HMX-based aluminized explosive. The charges of A-Ⅸ-Ⅱ explosive with density distribution in some order in the radial direction were pressed. The impact load test was carried out using a 400 kg weight drop. Results show that, with density increasing, the detonation threshold of A-Ⅸ-Ⅱ explosive, composition B and HMX-based aluminiferous explosive increases. When the density of A-Ⅸ-Ⅱ explosive is more than 1.680 g·cm^-3, its detonation threshold has no obvious change, whereas the detonating thresholds of three kinds of explosive have a little difference. When the density of A-Ⅸ-Ⅱ explosive distributes irregularly, its detonation threshold is decreased a little, lower than that of symmetrical density,indicating that pressing density and its asymmetry of charge are two principal factors affecting impacting safety.