Abstract: A practical method of secondary inner force analysis is presented for column-anchor retaining structure considering concrete creep based on concrete aging creep theory and equivalent elastic modulus. The results of secondary inner force of a detail retaining structure are also presented and discussed. It is demonstrated that the secondary inner force increases with the increasing of earth pressure or with the increasing of excavation depth under downward construction. The results also show that it is necessary to consider concrete creep for retaining structure near wall toe because the secondary inner force of this section is larger than others.