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In the past two decade,the Chinese government has paid a huge effort to solve the problem of drinking water in remote rural.As an alterative success case,rainwater harvesting and utility has been the most efficient way to supplying fresh water in rural areas of the Loess Plateau,a typical water resources serious shortage area in China.Focused on improving the quality of the rural village cistern water,study about the characteristics of ion release from building materials during runoff process with five representative materials used for rainwater collection:concrete,red brick,grey tile,red tile and soil was conducted.The ion releasing process and following effect on cistern water quality index,such as hardness,pH,conductivity,has been analyzed.Results revealed that the most release strength of different materials was arriving at 30s following startup.Furthermore,the test of effects of rain acidity on ion release procession showed that the total ion release increased with storm water pH declining,however,the release strength was irrelevance with runoff's pH.Based on research results,a detailed suggestion was provided to renovate intake construction of cistern for improving the drinking water quality in remote rural areas of Weibei Semi-arid District.