The utility model provides a plains region monitoring well, include: the well body is provided with the sleeve pipe at this internal vertical perpendicular to the ground of well, has as if the dry filtration hole in the below distribution of sheathed tube pipe wall, and the distribution has the part of crossing the filtration pore constitutes the strainer, and the parcel has the filter screen in the periphery of strainer, the sleeve pipe adopts the polyvinyl chloride material to make. Polyvinyl chloride material back cover is adopted to the sleeve pipe bottom. The application provides a plains region monitoring well, from structural, it accords with the requirement of plains region topography and soil texture situation, on the material of chooseing for use, both done benefit to the use of monitoring well, the material of selecting moreover can not influence the quality of water of groundwater yet to ensure the monitoring of quality of water, improve scientific research's accuracy, is the life -span of monitoring well 8 from resource make full use of 10 about year (safeguarding under the proper circumstances), lose the scientific research monitoring at it and do the time spent, it is still useful in the irrigation well or the domestic water well in field, accomplished the make full use of of resource.