This　paper　aims　to　study　the　frequency　characteristics　and　site　correlation　of　natural　seismic,　and　to　provide　a　basis　for　the　selection　of　natural　seismic　waves　in　shaking　table　test　of　rock　slope.　Taking　24　horizontal　seismic　wave　acceleration　time　history　records　of　Wenchuan　earthquake　as　the　research　object,　using　Fourier　transform　and　five-point　sliding　average　method　to　compile　the　Matlab　program,　the　dominant　frequencies　and　frequency　band　widths　of　seismic　waves　are　calculated.　Matlab　delay　cross　correlation　function　calculation　program　was　used　to　calculate　the　correlation　coefficients　of　seismic　waves　belonging　to　different　sites　and　analyze　them.　It　is　found　that　under　the　condition　of　similar　epicentral　distance,　the　dominant　frequencies　and　the　frequency　band　widths　of　soil　seismic　waves　are　obviously　different　from　those　of　bedrock　seismic　waves.　It　is　also　observed　that　the　maximum　and　minimum　values　of　the　correlation　coefficients　of　seismic　waves　between　the　bedrock　and　the　bedrock　are　correspondingly　larger　than　those　between　the　soil　layer　and　the　bedrock.　The　correlation　coefficients　of　seismic　waves　between　same　sites　are　more　likely　to　have　higher　values　than　those　between　different　sites.　Conclusion　is　that　the　frequency　characteristics　of　seismic　waves　between　different　sites　are　different,　and　the　correlation　of　seismic　waves　between　same　sites　is　stronger　than　that　between　different　sites.　When　natural　seismic　wave　acceleration　time　history　records　are　selected　for　shaking　table　test　of　rock　slope,　the　acceleration　time　history　record　measured　by　the　seismic　stations　on　the　bedrock　sites　should　be　selected.　©　2021,　Editorial　Department　of　Journal　of　SJZU.　All　right　reserved.