Abstract: Introduced the steel soil nails deep excavation in soft soil along the coast in the successful application, described in detail in the construction of technological innovation and to take concrete measures to deal with. The project will use innovative steel soil nails, and steel used in the calculation process of substitution of equal area, drawing on pre-construction steel pipe pile test data, the structure of the steel soil nail to improve and optimize steel soil nail length, spacing, and steel nails and surface soil layer connection node; by strict construction of the project management and technical track, strengthen the construction of unexpected aspects of preparation, the use of information construction, the construction appeared to weaknesses in the corresponding reinforcement measures, and finally the quality of the works in strict and security control, complete the construction tasks to ensure the security pit, and schedule requirements.