Abstarct: Slopes are always affected by dynamic loads such as earthquake and explosion loads, and in a complete analysis of slope stability, the effects of each dynamic load must be considered. Therefore, one of the dangers that always threatens the stability of slopes is related to explosions such as oil and gas transmission pipelines, power plants, warehouses of explosives and flammable materials in ports, etc. As a result, comprehensive studies are need to expose the credible design process for slopes. The effects of blast loading on slopes have been investigated with very few experiments. However, these experiments were performed due to relative limitations. Therefore, the importance of this issue led this study to investigate the effect of explosion load on slope stability numerically. Problem analysis has its drawbacks with large and sudden deformations during problem solving using the Grid-baxsed method. Meshfree methods are usually use to solve this problem. One of these methods, which has a special ability in analyzing the problems of explosion, impact, penetration and failure, is the smooth particle hydrodynamics method. In the present study, the effect of blast loading on slope stability was investigated. In this dissertation, the effect of explosion in crown, middle and claw positions has been analyzed using Abaqus software. Smooth particle hydrodynamics method has been used for modeling. After analyzing the results, the extraction speed was introduced to the Geo-studio software for stability analysis. The results show that the explosion in the slope claw has the greatest effect in destabilizing the slopes in all cases.