The　influential　factors　on　synthetic　seismic　waves　and　seismic　codes　in　China　are　described　in　detail　in　this　paper.　And　the　evolution　of　synthetic　seismic　waves　is　overviewed.　The　methods　of　synthetic　ground　motion　in　the　earthquake　engineering　field　are　summarized　in　order　to　provide　references　for　the　synthetic　ground　motion.　Based　on　the　study　situation　over　the　world,　the　issues　and　trend　are　presented.　Some　suggestions　are　provided　for　improving　the　codes　and　standards.