CCT family gene widely participates in the regulating process of flowering of plants. The research on CCT gene of Ae. tauschii may provide a reference for exploring the wheat's evolution, domestication and also help to understand the ecological adaptability of Ae. tauschii. The AetCCT were divided into ten subgroups based on phylogenetic analysis. Results of phylogenetic analysis show that 13 AetCCT members of Group A, C, H and G achieved rapid evolution. After normal selection effect of some branches, rapid evolution improves the adaptability of Ae. tauschii. The conserved motifs analysis suggest that AetCCT genes in the same Group may have similar function, the specific motif of different members among families and within family is likely to be the important reason for the different functional differences among different subfamily genes. The expression of AetCCT4, 7, 8, 11, 12, 16, 17, 19 and 21 has obvious biological clock effect, with the 24h rhythm expression, so it is speculated that these members are involved in regulating the growth and development such as flowering.