The test results of shear-wave velocity in engineering are becoming increasingly important

but the uncertainty of the wave test results influence the seismic design all the time.In order to accurately describe this uncertainty

the paper conducts some research on seismic response of the deep-soft sites.By using Shake 2000program and inputting a variety of ground motions

the authors discuss the ground response spectra and PGA changing rules of deep-soft site.The changing are caused by the variety of shear-wave velocity

which are given by the standard deviation of several velocity values.The results are as follows:the standard deviation of the shearwave velocities nearly has no influence on the acceleration response spectra and the PGA of the site;the changes of response spectra and PGA under different seismic intensities can be ignored.With the increase of the shear-wave velocity data

the study would get more accurate and deep results.