New studies have been discussed recently in which a strong correlation between Coulomb stress changes and the spatial distribution of earthquake have been. The stress change maps would be useful for earthquake hazard to foresee the most likely locations of the upcoming shocks. There is lots of evidence show that, changes in static stress after an earthquake have a great effect on the occurrence of subsequent events and control the faults activity. We perceive that the successive events on the Kermanshah areas have characteristic spatial distribution patterns and the seismicity after the main shocks is consistent with the Coulomb stress change. The western part of the Zagros Folded Thrust Belt (ZFTB) had experienced large earthquakes that occurred during the 2017-2018. These successive events could import stress on the surrounding faults. Therefore, we calculated Coulomb stress changes on the nearby faults that are located near the major 3 earthquakes. This modeling can be used as a powerful and acceptable method in most parts of the world and the work done using this method has provided acceptable results. Therefore, in this dissertation, this modeling has been used to investigate the stress changes created after the earthquake of November 12, 2017. Results of Coulomb stress changes of the first earthquake (12.11.2017 Mw=7.3) showed that Tazehabad fault (25.08.2018 Mw=5.9) has not seen an increase in stress whiles in part of Ezgeleh and Sarpol-e Zahab faults, northwestern part of high Zagros fault (HZF), and northwest of MFF fault have experienced an increase in stress. Stress change from Ezgele earthquake showed that increased stress in the northwestern parts of Sarpol-e-Zahab fault and this can be triggering the Sarpol-e-Zahab earthquake (25.11.2018 Mw=6.3). The northwestern end of Sarpol-e Zahab fault, most parts of Azgeleh fault, the southern end of Khanaqin fault, the northwestern tip of the high Zagros fault have experienced increased stress and these faults c