The purpose of this paper is to discuss in depth the research content and implementation steps of intelligent digital geotechnical foundation pit support technology. Using a research method combining literature review and case study analysis, relevant information about intelligent digital geotechnical foundation pit support technology is collected, collated and analysed from literature data, and the application of intelligent digital geotechnical foundation pit support technology in the construction of geotechnical foundation pit projects is illustrated through a case study of the Shanghai Centre Tower project. It has been studied that intelligent digital geotechnical pit support technology is an advanced geotechnical engineering support technology with the characteristics of high precision, high construction efficiency and low risk. In practical engineering applications, this technology can provide effective technical support and guarantee for foundation pit construction through design and simulation scheme, real-time monitoring and control scheme, decision optimization and automation scheme, monitoring and evaluation scheme, etc.