Abstract：The earth and rock excavation volumes of the permanent shiplock account for 40 percent of the total of the whole Three Gorges Project(TGP). The study of the excavation technique is quite systematic and comprehensive to guarantee the construction success. The study includes the blasting gears and materials，blasting mode，parameters of blasting，initiating connection，control index of the velocity of particle vibration of rock，thickness of lateral preserved protective layer during trench excavation，thickness of the protective layer of bed rock，control index of initiating charge for single interval，assortment of explosive，construction tools and equipment as well as construction technology. The excavation technique adopted for the vertical walls is more reliable and much safer compared with the excavation mode such as pre-split blasting to excavate at one time or other modes. This technology is able to satisfy the requirements of construction quality and construction progress，successfully facing the challenge of the excavation of the world-class high vertical slopes of the permanent navigation shiplock.
