Following　the　site　classification　methods　proposed　the　Chinese　seismic　code　(Code16)　and　the　Next　Generation　Attenuation　(GMX),　the　site　conditions　of　62　strong　motion　observation　stations　located　in　Sichuan,　China　were　classified　based　on　their　site　conditions.　Then,　the　site　amplification　coefficients　and　high-frequency　attenuation　parameters　(kappa(0))　of　these　selected　stations　were　used　to　investigate　the　local　site　effect　characteristics　of　each　site　classes　in　average　sense.　The　result　shows　that,　in　the　range　of　Code16　site　class　II,　at　frequencies　above　10　Hz,　the　amplification　of　GMX　site　class　C　is　significantly　enhanced　by　the　topographical　effect　due　to　narrow　mountainous　valley　site　condition;　whereas　at　frequencies　below　5　Hz,　the　amplification　of　GMX　site　class　D　is　noticeably　enhanced　by　the　deep　soft　sediments.　Considering　the　source　slip　model,　the　differences　of　quality　factor　between　mountainous　and　basin　aeras,　the　local　site　effects,　and　the　average　stress　drop　of　regional　aftershocks,　the　acceleration　time　series,　Fourier　Amplitude　spectrum　(FAS)　and　5%-damped　pseudo-spectral　acceleration　(PSA)　of　9　stations　located　within　100　km　rupture　distance　(R-rup)　range　with　respect　to　the　2022　Lushan　M(S)6.1　earthquake　were　simulated　using　the　stochastic　finite-fault　simulation　method.　The　result　shows　that,　the　simulated　time　series　fit　well　with　the　S-wave　portion　of　observation.　Moreover,　at　period　shorter　than　8　s,　the　shapes　of　simulated　FAS　and　PSA　matched　those　of　observations.　The　satisfactory　simulation　result　supported　that　the　current　earthquake　is　most　likely　to　be　an　aftershock　of　the　2013　Lushan　M(S)7.0　earthquake.　Moreover,　the　simulation　result　captured　the　obvious　directivity　effect　observed　when　R-rup　＜　35　km.　Finally,　taking　the　average　site　amplifications　and　kappa(0)　values　of　each　site　classes　into　account,　the　attenuation　characteristics　with　respect　to　R-rup　of　simulated　and　observed　peak　ground　acceleration　(PGA),　peak　ground　velocity　(PGV),　and　spectral　acceleration　at　periods　of　0.5　s,　1.0　s,　5.0　s,　and　8.0　for　167　basin　and　130　mountain　stations　with　R-rup　＜　150　km　were　compared.　The　result　indicates　that,　the　attenuation　rate　of　ground　motion　parameters　and　the　levels　of　PGA　and　PGV　of　basin　and　mountain　stations　are　similar.　However,　at　period　longer　than　1.0　s,　the　spectral　accelerations　of　basin　are　systematically　larger　than　those　of　mountain　area.