Farmland pollution at Lingwu farm in Ningxia province is a significant source of non-point source pollution. Different sources like domestic sewage, livestock breeding, and agricultural runoff contribute to pollutants like COD, TN, and TP. The total amount of pollutants is 1.69 million kg/a, with COD being the highest at 84.1%. TN and TP are the main pollutants, with TP from livestock breeding being particularly high at 82.09%. Measures like improving rural industrial structure and promoting ecological agriculture are suggested to reduce pollution emissions.