The mechanical properties of biomechanical equivalent artificial soft materials is very important to the study of dynamical experiment dummies. Based on longitudinal vibration theory and resonance principle, an experimental method was developed to measure the mechanical properties of silicon rubber soft materials according to shock response. The test platform for testing mechanical properties of soft materials was established and factors influencing test results were analyzed. Three set of specimens with different hardness were tested and the inherent frequency and elastic modulus of the specimens were obtained. On the basis of experiments, the inherent frequencies of the specimens were obtained by mode analysis using finite element analysis software. Comparing the inherent frequencies obtained by experiment and calculation showed that the error is very little, which verifies that the experimental method is correct and validated. The research results also showed that the inherent frequency of soft test bar is the inverse ratio of its length and the direct ratio of its hardness, which is important to the dynamic research and analysis of soft cylinder test bar.
