Abstract: To make out the first technology standard with China characteristic for selecting CL-C slurry materials, it begins with the study of the slurry congeal process and main chemical reactions. Then according to the engineering requirements on slurry physical and three state changes in the studied CL-C slurry and combined with the slurry physical and chemical properties and the result in the application of six slurry engineering injections in recent eight year in China East, this paper presents 8 kinds of clays and 3 kinds of cements and 2 kinds of water glass and 2 kinds of waters suitable to be used as selection technical standard for CL-C slurry injection materials.