Abstract:With the extension of construction projects to high altitude and underground, the number of deep foundation pit projects is increasing, and the importance of deformation monitoring technology is becoming increasingly prominent. In order to reduce the safety risks of deep foundation pit construction and ensure construction safety, this article starts with an overview of deep foundation pit deformation in construction engineering, and elaborates on the commonly used deep foundation pit deformation monitoring technologies, such as total station monitoring, level monitoring, inclinometer monitoring, etc. Combined with practical cases, various monitoring technologies are comprehensively applied to carry out deep foundation pit deformation monitoring, verifying the effectiveness of these technologies in ensuring construction safety and improving monitoring accuracy.