Abstract: To effectively prevent the blast damage of buildings and structural elements through blast walls, an accurate prediction of the blast loads in terms of the peak pressures on blast walls is necessary. Numerical simulations were adopted to study the blast loads on blast walls with inclinations varying from 5皌o 30癮nd their corresponding blast attenuation effects. Reflections and refractions of the blast wave from blast walls with inclinations were analyzed. The distribution and prediction equations of the blast loads on the blast walls were explored from the numerical analysis. It is concluded that the blast wave attenuation effects are similar for blast walls with different inclinations. When the blast wall is anticlockwise inclined, the maximum moment on the wall is much smaller, which reveals the mechanism of the anticlockwise inclined blast walls widely adopted in engineering.