Recyclable soil nailing is formed by welding a steel wire with a certain height on the optimum diameter steel pipe. The recyclable soil nailing is connected with the specific length by special connection structure and screwed into foundation pit slope by using the rotating construction equipment. The processes of the described above form a new type of assembly recoverable soil nailing. The traditional soil nailing stress mechanism relies on the cohesive force or friction between grouting anchor solid and soil. The new type of soil nailing changes the stress mechanism into friction between soil and steel tube interface and extrusion force between soil mass and the wire ends. The working mechanism of new type of soil nailing is obtained by field tests, the optimization of numerical simulation and field application tests. The new type of assembly recyclable soil nailing adapts to construction industrialization trend, reduces geological environment pollution and realizes building materials to be recycled. Therefore it has obvious engineering value.