In　this　paper,　the　study　situation　of　seismic　ground　ruptures　is　summarized.　Based　on　the　data　of　historical　strong　earthquakes　in　China,　the　seismic　ground　ruptures　occurred　in　340　events　with　magnitude　over　6　in　China　mainland　since　1900　are　analyzed　statistically,　and　the　magnitude-frequency　curve　of　the　seismic　ground　ruptures　is　obtained.　It　is　pointed　out　that　the　current　deterministic　estimation　on　the　effects　of　the　seismic　ground　ruptures　is　insufficient.　Finally,　the　simple　probabilistic　estimation　method　of　seismic　rupture　effects　is　studied　and　the　relevant　probability　level　needed　be　considered　for　sites　is　discussed.