Abstract: With the increase in the number and quantity of engineering construction projects in China, deep foundation pit construction is becoming more and more common in construction projects. Due to the unique underground and surrounding environment of deep foundation pits, in actual engineering, it is not only necessary to do well in foundation pit support work, but also to monitor changes in the surrounding environment at any time. Therefore, in response to the shortcomings of traditional monitoring methods such as low efficiency, delayed information feedback, and high monitoring costs, this paper takes deep excavation engineering as an example and designs an automatic collection, transmission, and processing system for monitoring data of deep excavation engineering through various technical means such as total station, sliding inclinometer automatic monitoring technology, and sensor automatic data collection technology. The results show that the monitoring results of this technology are basically consistent with the deformation state through the comparison of on-site measured data and monitoring data, further verifying the reliability of theapplication of automatic monitoring technology in deep foundation pit engineering monitoring.