Abstract:The mogao Grottoes were first carved in 366 AD, and have been carved for a thousand years by different generations. Mogao Grottoes is the first cave opening period, the longest continuous period, the largest number of preserved works of art, China's leading cultural and art Treasury. Since the establishment of research and protection institutions in the mogao Grottoes in the 1940s, man-made destruction has been stopped, but the natural diseases of rock mass have not been eliminated. Since the 1950s, the reinforcement project has adopted the way of large gravity retaining wall and pier. At present, this is the best reinforcement method for Mogao Grottoes, and it is also imperative.