Considering the effect of soil on the performance of structures during an earthquake is a subject that has been considered by many researches in recent decades. Soil is an important factor that can affect the structure's performance. Studies on the effect of soil on the performance of structures have been carried out more in the area of the effect of the site and less attention has been paid to the interaction of soil structure. Due to the importance of this issue, the present paper examines the effect of soil and structure interaction on seismic performance of steel flexural frames using Abaqus finite element software and time histories analysis. The results of the studies showed that the levels of classroom changes would decrease if the soil and structure interaction were considered. According to the results, the highest displacement occurred at the upper surface of the soil, and the soil would sit at about 34 cm.