To　improve　the　accuracy　with　which　the　non-stationary　intensity　characteristics　of　artificial　acceleration-time-history　curves　are　determined,　a　method　of　adjusting　the　frequency　correlation　between　the　artificial　peak　arrival　time　and　amplitude　spectrum　is　proposed.　A　calculation　method　for　determining　the　peak　arrival　time　to　reflect　the　physical　meaning　of　the　phase-difference　spectrum　was　first　deduced.　Subsequently,　the　amplitude-distribution　characteristics　corresponding　to　the　peak　arrival　times　for　different　durations　of　natural　earthquakes　were　analyzed.　In　accordance　with　the　distribution　characteristics　of　the　reference　amplitude,　the　frequency　distribution　of　the　artificial　peak　arrival　time　was　divided　into　four　parts:　the　beginning,　strong-earthquake,　attenuation,　and　tail　sections.　By　adjusting　the　arrival　frequency　of　peak　points　for　the　different　earthquake　durations　considered,　the　corresponding　relationship　between　the　artificial　peak　arrival　time　and　amplitude　spectrum　was　determined　to　be　more　consistent　with　the　general　law　of　natural　earthquakes.　The　sample　calculation　described　in　this　paper　demonstrates　that　adjusting　the　frequency　correspondence　between　the　artificial　peak　arrival　time　and　amplitude　spectrum　greatly　improves　the　accuracy　of　the　non-stationary　intensity　characteristics　of　artificial　acceleration-time-history　curves.