This paper takes a certain tunnel project in Yinxi high speed rail as an example, to introduce the independent R & D technology of automatic monitoring technology on the tunnel surrounding rock measurement, and the establishment of safety monitoring platform using GIS, BIM and IoT (Internet of Things). The platform gives full play to the advantages of BIM model information integration and visualization, and realizes the integration, transfer and share of information of high-speed railway tunnel monitoring measurement in the BIM model from the practical application level.