Abstract: Based on an engineering example a 2-dimensional model is established by use of ANSYS. The countermeasures and influences of deep excavations on retaining structures of the existing high slopes are studied combining with experience of design and construction of slope engineering. This work mainly includes the distribution laws of stress and strain on the tunnel of high slopes with and without retaining structures as well as the countermeasures of retaining structures. It has important theoretical and practical significances.