To　obtain　an　accurate　uniform　hazard　spectrum　(UHS),　this　paper　proposes　combining　a　stochastic　simulation　with　probabilistic　seismic　hazard　analysis.　The　stochastic　method　fully　accounts　for　the　effect　of　the　source　mechanism,　path,　and　site　effect.　Historical　ground　motions　in　the　site　specific　to　the　nuclear　power　plant　(NPP)　are　simulated,　and　a　UHS　with　an　equal　exceeding　probability　is　proposed.　To　compare　the　seismic　performance　of　the　NPP　under　different　ground　motions　generated　by　the　existing　site　spectrum　(SL-2),　the　UHS　generated　by　the　safety　evaluation　report,　and　the　US　RG1.60　spectrum,　respectively,　a　three-dimensional　finite　element　model　is　established,　and　dynamic　analysis　is　performed.　Results　show　that　the　structural　responses　to　different　spectra　varied;　the　UHS　response　was　slightly　larger　than　that　of　RG1.60.　This　finding　is　relatively　more　reasonable　than　prior　research　results.　The　UHS　generated　using　the　stochastic　simulation　method　can　provide　a　reference　for　the　seismic　design　of　NPPs.