Experimental and numerical investigations were performed on explosive shock wave around the blast wall and explosive loads on the protective wall. The transducer pressure technology was adopted to measure the pressure distribute around the protective wall. Using ALE algorithm and the JWL state equation for the product of explosive shock wave , the numerical simulation of the shock wave rounding the wall was conducted. The initial development of explosive field and the circulation current behavior were obtained and the law of shock wave rounding the wall was analyzed. Both experimental and numerical results were in good agreement, which showed the inherent mechanism of blast wave rounding the wall and provided a reference for reinforcement mechanism study of wall for explosive atmospheres.