Abstarct: Structural conditions are one of the most important and influential factors on the dynamic Structural conditions are one of the most important and influential factors on the dynamic response of the site. The local conditions of the site have a significant effect on all the important characteristics of a powerful land movement, including amplitude, frequency, and duration, meaning that the characteristics of an earthquake, depending on the physical and dynamic characteristics of the site, can be amplified or deamplified at certain frequencies. In 1331, an earthquake 5.5 occurred in the village of Torud and 135 kilometers south of Shahrud, causing great damage and killed nearly a thousand people, which illustrates the significance of this study for Shahrood. In this study, an earthquake in bedrock level is required for ground response analyze there fore, the earthquake parameters are obtained using probablitic risk analysis for different return periods and the related earthquake are generated artificially. The risk analysis for the return period is 100 years, 475 years, 975 years, 2475 years and 10,000 years. And, using the risk analysis spectrum, five earthquake records have been generated. Using a databaxse of geotechnical experiments in Shahrood, 2 different types for soil profile were considered and then the site response analysis was done in a linear way. The results of the risk analysis indicate that the specific range of the site in this study for the return period of 475 years is 89% of the range of the 2800 regulation range. The results of the analysis of the site response show that the acceleration of the earth's surface relative to the bedrock acceleration is about 70% for the acceleration of the bedrock, but in other parts of the earth's acceleration, relative to the acceleration of the bedrock for the return period of 100 years, 475 years and 975 The year will increase by about 5%, but will decrease by about 12% for the period of 2475 years and 10,000 years.