GIS technology has quite numerous advantages whichinclude:intelligence，quick analysis，multilayered visualization and presentation and delivery of information.In recent years，GIS technology is identified as a major tool to study agricultural non-point sourcepollution.Hence，GIS topics related to agricultural nonpoint source pollution are expounded in thisarticle.Theseinclude:data processing and management，temporal and spatial heterogeneity and distribution，GISdevelopment，datavisualization，modelling andsimulation，pollution risk assessment and early warning forecast etc.The article puts forward the application of GIS for control of agricultural non-point source pollution and for facilitating policydirectives，and it further directs the subject ’s research trend.