Abstract: An analysis of the split Hopkinson pressure bar (SHPB) test at high loading rate is presented concerning the experimental data, the numerical simulation and the description of constitutive laws of specimen. First, the validity of the classical SHPB analyses at high loading rate is re-examined using one-dimensional simulation of SHPB test. On the other hand, the numerical simulation of the SHPB test at high loading rate using the constitutive law of the specimen obtained by classical SHPB analyses is performed to reproduce the experimental reflected pulse and transmitted pulse. Some experimental facts of SHPB tests at high loading rate revealed by Wu et al are also indicated in simulated examples, i.e., that the stress equilibrium between the ends of compression SHPB specimens is dependent on specimen length and loading rate.