Abstract: In recent years, with the rapid advancement of new urbanization construction, a large number of old buildings need to be renovated and expanded, and the renovation and expansion projects have ushered in new development opportunities. Anchor rod static pressure piles are widely used in the reinforcement of old foundations in renovation and expansion projects due to their advantages such as less construction site restrictions and less construction vibration. This article focuses on the actual situation of insufficient bearing capacity of the original foundation and the need for foundation reinforcement treatment in a certain renovation and expansion project. Through theoretical analysis and scheme demonstration, it is finally determined to use anchor static pressure piles for foundation reinforcement and carry out technological innovation. Specifically, BIM technology is used to simulate the construction process of foundation reinforcement and detailed node simulation to achieve standardized production of components, A concave convex interlocking connection steel plate was used in the design for square pile connection to improve the pile's resistance to tensile cracking and bending shear. The internal bonding of the system structure was enhanced by using a steel template wrapped with an air bead film. This technology solves the problems of easy pile breakage and difficulty in ensuring integrity in anchor static pressure pile construction, improves the quality of pile foundation construction, ensures construction safety, and provides reference and reference for similar projects.