[Objective] The quality survey and pollution assessment of shallow groundwater was conducted in Chengdu plain in order to provide theoretical basis for soil and groundwater resources protection and the rational development and utilization of groundwater resources in this region.[Methods] Sixty shallow groundwater samples were collected in the typical sample area of Chengdu plain, and 11 indicators including the pH value, total dissolved solids, total hardness, chloride, ammonia nitrogen, fluoride, nitrate, nitrite, sulfate, iron and manganese were analyzed. The groundwater quality in the study area was evaluated by the hierarchical ladder evaluation method and principal component analysis method (PCA). And the comprehensive evaluation map of water quality was drawn by MapGIS.[Results] Some indicators of shallow groundwater in the study area exceeded the standard, especially nitrate pollution, followed by total hardness, iron and manganese.[Conclusion] The groundwater quality in the study area is generally good, except for a certain degree of pollution in some areas.