Two controversial opinions on the recharge of theOrdos Basin groundwater were discussed in this study. The problems in the previous studies on recharge, runoff, and discharge models of the Ordos Basin were discussed: （1) The soil water, the most important part of the conversion among atmospheric water, surface water, soil water and groundwater, is not taken into account. The groundwater circulation model obtained by the conceptual model cannot be used to explain the fact that watershed is in coincidence with the basement fault zone. （2) The comparison of the isotopic compositions in dolomite with that in calcite is not conducted in some scholars' studies of the geochemical reverse simulation, with the result that the simulation results can be applied to explain the C isotope compositions in dolomite and calcite. （3) 14 C can not be used to obtain the ages of the groundwater in north China because of the interference of the deep CO2. Based on the D, 18Oand Cl- compositions in the soil water, it is pointed out that the precipitation is not the main recharge source of the groundwater and the soil water is fed by the groundwater. The groundwater in the Ordos Basin is recharged by the exogenous water and deep faults are the main water channels.