In the disposal measures to ensure the stability and safety of the foundation pit support and the foundation pit monitoring, the traditional foundation pit monitoring technology has some defects in practice, which cannot give warnings in the first time. With the introduction of innovative technologies and information platforms such as BIM technology and intelligent construction site platform, the shortcomings in the traditional foundation pit monitoring have been effectively solved. The detailed situation of the foundation pit project is then classified into the three-dimensional model, and the collision inspection function is adopted to explore and find the insufficient support in the design, so as to effectively improve the design efficiency and quality and construction safety of the complex deep foundation pit, ensure the smooth delivery of the project to the owner.