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In Taihu drainage basin,drinking water sources mainly include river water,reservoir and lake water,puddle and vault water,well water and spring water as well.The major problems of rural drinking water in Taihu drainage basin as follows:The low overall level of rural water supply severely affecting people s health and normal life,insufficient drinking water sources in some rural areas and low guaranteed rate as well as poor-quality rural drinking water.Aimed at main problems of drinking water in rural area and based on reverse osmosis membrane technology,three set of pilot plants which combine the techniques of UF,MF,sand filtration,AC adsorption and UV sterilization are designed and installed to purify the drinking water from different drinking-water sources such as well water river water and lake water.According to the water quality objective for eliminating compound micro-pollution of shallow groundwater,removing excessive minerals and softening the well water,Ion exchange and reverse osmosis have been adopted as main technologies for designing the further treatment equipment for well water.In allusion to the characteristics of serious organic pollution and high contents of mud,sand and suspended matter of the river water,integrated technologies of ultrafiltration(UF),microfiltration (MF) and reverse osmosis treatment are adopted in designing the further treatment equipment for river water.Aimed at the main problems of organic compound polluted water source in Taihu Lake,combined technology focusing on bio-filtration and R/O membrane has been designed and the corresponding further treatment equipment assembled.Three set of equipments have good effect on the treatments for purifying water.The product water has reached the standard of direct drinking water by the further treatment of raw water from Taihu Lake and well water.The high-quality drinking water is reached by the further treatment of river water.