Groundwater over pumping brought some serious geological environmental problems in the Suzhou-Wuxi-Changzhou area. This pa -per sorted out the banning course and analyzed the effect after banning groundwater pumping. From the relation and internal law of differenttypes of groundwater pumping and land-surface subsidence, rationally scientific and rational analysis on some shortages of banning commandwas done. Some constructive opinions and strategies were advanced in sustainable utilization and protection of groundwater in the area.