Abstract: Jet grouting started at Japan in 1968,and was introduced to China to be studied in 1970s.At present,high pressure rotating jet grouting is the most widely used method with the most mature technology.The quality of rotating jet grouting and the bearing capacity of single pile are studied and analyzed,which provides design reference for the application of ground and foundation engineering,hydro engineering,water sealing and reinforcement engineering.Three test sites were selected in a built-up community in Yan'an city,Shaanxi Province,and the piles were made according to different construction techniques of rotating jet grouting.Through detection of pile body integrality and test of single pile bearing capacity,the quality of rotating jet grouting and the bearing capacity of single pile were analyzed.