Abstract: In order to solve the problems of difficult to lead pipe, deformation and even rupture in the process of PVC cuff pipe drilling under complex geological conditions on the weakening effect of foundation reinforcement, the paper proposed a new type of separated steel lead pipe drilling bit with effectiveness analysis and validation in the engineering application of cuff pipe soil reinforcement, and the results show that, through the application of the method, it is possible to ensure that the cuff pipe can be led to the design depth quickly and effectively in the weak foundation. The results show that the application of this method can ensure that the sleeve valve tube in the weak foundation is quickly and effectively led to the design depth, effectively solving the verticality of the sleeve valve tube in the soil and the deformation and rupture problems in the process of leading, which not only ensures the quality of the project, but also shortens the construction period and reduces the cost of wear and tear. In addition, the connection of the water-soluble gluing material is easy to separate the hauling, which not only improves the recyclability of the construction materials, but also reduces the environmental pollution of the engineering materials, which has obvious social and economic benefits, and can be used for designers and constructors of the deepening of foundation treatment. It has obvious social and economic benefits and can be used as a reference for the designers and constructors of foundation deepening treatment.