Abstract: The shizitan damwas constructed in the 1950’s. Because of the limit in aspects such as design and construction, the anti-seepage effect was not so good. This is one reason for the uplift pressure exceeded the standards. Furthermore, the dam has been in operation for many years, the organic items’concentration leads to the low- level reservoir water weak acidulated and eroded CO2. This paper, combined with the data of shizitan dam, analyzed the reasons for uplift pressure exceeded the standards at some damblocks and advanced the treatment measures.