Abstarct: What it makes the presence of a soil laxyers more important during earthquake, is the capability of amplification of seismic waves by that laxyer, which is defined to as site effect. Free ground response analysis states the amplification of earthquake waves, which is very important in geotechnical earthquake engineering. Determination of site effects is one of the most important challenges in many projects and researches. But since in reality, there are loads like high-rise building on the ground, ground response is affected by these loads. The presence of high-rise buildings on the site can be very important in consideration of amplification functions and evaluation of acceleration distribution in soil depth and in determination of shear forces exerted to the structure. In order to study the effect of the high-rise buildings. In amplification functions of soil, 10, 20 and 30 storey concrete buildings on several types of sand and clay in different depth of bed rock are analyzed under earthquakes with different frequency contents which are performed using ABAQUS a finite element baxsed program. Effect of high-rise buildings on horizontal component of the bedrock motion to free ground motion with estimate common geotechnical earthquake parameters such as amplitude and frequency of amplification function and response spectra in frequency domain, and maximum acceleration distribution in soil depth was studied in time domain. In the frequency domain, results show that variations of amplitude and value of amplification function, according to vibrational characteristics of structure and dominant frequency of soil, strongly under the influence presence of building, so that construct 30 story had greatest influence on these variations. In addition, in the time domain, all models, mass of structures causes reduction of the pick acceleration on the soil surface and pattern of the maximum acceleration distribution of soil per depth has been changed than nonexistence of structure in soil profiles. Totally, it was shown that high-rise buildings can change frequency content of the ground motions strongly. So it is necessary to consider frequency content of earthquake in site effect studied in code 2800 when there are high-rise buildings.