Abstract: The research on the stress behavior of concrete face and its improvement measures is one of key technical problems for high CFRD. The dam deformation, especially the post dam deformation, is the key factor to determine the stress behavior of the concrete face. For super-high CFRD, large post dam deformation easily causes damage of concrete face and vertical joints. Compression vertical joints adopting flexible joints with enough width can absorb the axial deformation and reduce the axial pressure of the concrete face. The deformation control and suitable joint plan are the key to improve the stress behavior of the concrete face and are also the key to avoid or reduce the rupture of the concrete face.