The spatial and tempo ral activity characteristics of strong earthquakes around Ordos massif (34°~42° N, 104.5°~114.5° E)are studied by using the earthquake data(M_S ≥ 6.0) from A. D. 400 to 2000. The result shows that there are characteristics of active in stages, the spatial and temporal order in migration, filling seismic gaps and epicenters repeat, distribution of strong earthquakes be equal in distance. The seismic risk analysis shows that the possible places of next M_S 7 earthquake are both ends on Yinshan seismic zone in north margin of Ordos massif.