Abstract: In combination with the actual project, the application of geosynthetics are introduced. The results show that woven nonwoven geotextile, nonwoven geotextile, filling bags and other geosynthetics can be used to solidify soil sea dike project, and they play the role of drainaging, filtration, separation, protection and so on. The key technical problems of mud embankment is solved. The construction of water transportation is promoted. They are worthy of further application.