Abstract：The current groundwater pollution conditions of different aquifer systems of Northeastern Ordos Basin were analyzed using correspondence analysis method using the monitored data in 2014. And the major pollutants, its pollution sources and pollution pathways were explored. The results indicate that pollution of NO3- was serious due to agricultural production, pesticides and fertilizers casting in the inner flow area of western study area and Wuding river downstream areas. In the inner flow area of western to the diving evaporation concentration effect, industrial wastewater, domestic sewage and garbage leachate with high Cl- content from the upstream infiltrates into the groundwater, leading to an increase of Cl- and TDS. High hardness water is widely distributed in study area, the leachate of biodegradable organic matter contained in domestic sewage and solid waste raises CO2 equilibrium pressure, or acidic leaching of industrial acidic waste water promote the dissolution of mineral containing Ca2+, Mg2+, leading to an increase of hardness.