The soil nailing wall of building foundation pit is a compound force body with its own deformation coordination ability, its stress deformation is similar to the gravity retaining wall, the internal stability of the compound body is maintained by the action of soil nailing and in-situ soil mass, the external stability of the soil-nailing structure is maintained by the soil-nailing composite. Based on the engineering practice, this paper summarizes the main technical points of the construction procedure of the soil nailing wall, and systematically summarizes the key points of the technical management of the construction and service period of the soil nailing wall from the action mechanism, it has positive reference significance for similar projects.