The construction technology for the excavation of the foundation pit of adjacent structures first involves conducting an engineering investigation to determine the key and difficult points of the project as well as potential safety hazards. On the premise of ensuring the elimination or reduction of safety risks, targeted measures are taken to eliminate or reduce the safety hazards, and necessary detection methods are employed to digitally and intuitively represent the safety of the project. Based on the anticipated working conditions as determined through on-site investigation and the actual data reflected by the investigation, effective engineering measures are adopted to ensure the safety of the project construction.