Abstract: In the heavy traffic,highway traffic big car settlement monitoring,such as carried out by the traditional manual method,will bring a lot of inconvenience to the layout and measurement work.This paper automatic monitoring through the process of pipe jacking crossing expressway,and collection,analysis and research on the related monitoring data,provide the basis for the design and construction of the relevant follow-up project,promoted the development of monitoring information technology industry.For the future monitoring of similar engineering has a very good reference.