A good deal of high water content sludge which is produced in engineering construction, with high water content, low strength, high compressibility, low permeability, high sensitivity and other undesirable engineering properties, and often contaminated. How to deal with and make rational use of high water content sludge becomes the hot topic discussed by engineering and academia. The material used in this study is sludge with high water content from the Metro construction sites in Hangzhou. In this paper, our main research is the influences of the different contents of cement, lime, gypsum, fly-ash on the curing strength character of silt. The product structure was analyzed by XRD.