In order to study the protective performance of naturally aged bulletproof vests on human body, the work aims to conduct the impact experiment to examine the blunt impact effect of handgun bullets on gelatin targets with protective measures. The instantaneous concavity in the gelatin target during blunt impact was photographed by high-speed photography to determine whether natural aging affected the protective performance of bulletproof vests. The experimental results showed that, under the protection of bulletproof vests aged over 10 years, the average instantaneous maximum concave depth in the gelatin targets was 23.32 mm and the average maximum diameter was 70.08 mm. In comparison, for gelatin targets protected by new soft bulletproof vests, the average maximum concave depth was 28.76 mm and the average maximum diameter was 66.59 mm. The natural aging for 10 years does not significantly affect the bullet-resistant performance of the soft bulletproof vests. This study provides reference information for extending the safe service life of naturally aged soft bulletproof vests.