Abstract: This study explores the key technologies for the synchronous installation of prefabricated foundation construction and equipment bottom grounding system in box type substations. Through precise design and high-precision construction, the precise connection between the basic module and the grounding system is ensured. During the construction process, a dynamic monitoring system is used to track various technical indicators of the foundation installation and grounding system layout in real time, ensuring that the construction accuracy requirements are met. The actual test results show that the foundation installation error and grounding resistance meet the design requirements, providing stable electrical safety guarantee for the project.