Integrating with engineering examples,the paper introduces deep foundation composite soil-nailing bracing mechanism under high-sen-sitivity soil condition,describes composite soil-nailing wall bracing construction technology procedures,discusses operation points of earthwork excavation,soil-nailing construction,casting and concrete spraying and so on,and finally summarizes matters needing attention in construction, so as to guarantee foundation safety.%结合工程实例，介绍了高灵敏度土质条件下，深基坑复合土钉墙支护的作用机理，阐述了复合土钉墙支护的施工工艺流程，论述了土方开挖、土钉施工、注浆、混凝土喷射等工序的操作要点，并总结了施工中的注意事项，确保了基坑的安全性。
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