Based on the classified site criterion in current seismic design code of building (GB 50011-2010) and quantitative classification scheme of near-fault ground motions proposed by Baker, the sites of 746 accelerograms from the strong-motion databank of some countries were classified as four site classes, and the 746 accelerograms were classified as far-field, near-fault and near-fault pulse-type ground motion accelerograms. Using the selected accelerograms, the empirical equations of near-fault pulse-type ground motion corresponding to four kinds of sites were presented for the inelastic displacement ratio spectra of constant ductility and constant yielding strength. The effects of site condition and different ground motion parameters on inelastic displacement ratio spectra were also evaluated. It is concluded that the influences of near-fault pulse-type ground motion on displacement ratio spectra of constant ductility and constant yielding strength are significant at periods ［0.3 s,5 s］ and periods ［0.5 s,3 s］ respectively, and site condition can control the period ranges of the above significant effect. PGV／PGA can provide the largest influence on displacement ratio spectra for near-field ground motions.