The high slope for the permanent shiplock of the Three Gorges Project (TGP), excavated from the mountain body on the left bank, is one of the major technical issues of the Project construction. The excavation for the slope on each side is 170 m deep in maximum consisting of a 68m high vertical wall on its lower part. Several aspects are described in the paper for the permanent shiplock slope including the general description, design principles and outline,construction procedures, seepage prevention and drainage system, consolidation and support measures, stability analysis, deformation prediction, monitoring data verification as well as some significant scientific and technical achievements.