After　the　Fukushima　accident　in　Japan,　the　nuclear　safety　regulatory　authorities　of　South　Korea　and　other　countries　have　required　the　installation　of　automatic　seismic　trip　system　(ASTS).　In　2019,　the　National　Nuclear　Safety　Administration　issued　the　Seismic　Design　and　Evaluation　of　NPPs　(HAD102/022019),　which　specifies　the　role　of　seismic　instruments　in　nuclear　power　plants　(NPPs),　including　the　role　of　ASTS.　At　the　same　time,　it　also　puts　forward　relevant　requirements　on　whether　to　install　the　ASTS.　In　2019,　China　revised　and　issued　Code　for　seismic　design　of　nuclear　power　plants　(GB　50267-2019),　the　seismic　alarm　index　should　be　fully　demonstrated.　According　to　the　investigation　and　study　of　the　nuclear　safety　regulations　and　standards,　and　combining　with　the　seismic　level　of　NPPs　site　in　China,　this　paper　puts　forward　some　suggestions　on　whether　to　set　ASTS　and　the　selection　of　ground　motion　parameters　of　ASTS.　©　2021　IEEE.