In order to improve the safety of the first joint polder project in Langxi County,the embankment is reinforced.Combined with the actual situation of the project,the anti-seepage reinforcement scheme of the embankment body and foundation is analyzed.After scheme comparison and selection,the dike body adopts multi-head small-diameter mixing pile scheme for anti-seepage reinforcement;the embankment foundation adopts the anti-seepage scheme of filling pond and solid foundation.After analysis and calculation,the safety of the embankment after reinforcement is significantly improved,which can provide reference for similar projectsl.