There exist a lot of buildings above and around Huaishuping tunnel, which is a doublearched largespan tunnel with shallow overburden. In order to ensure that no adverse impact can be imposed on the surrounding buildings by the blasting excavation of the tunnel, blasting vibration monitoring is performed in the job site by means of UBOX20016 vibration signal automaticrecording instrument and, on basis of the monitoring results, the blasting design is optimized and such technologies as more shotholes, less charging quantity, millisecond ignition, wedgeshaped cut hole are adopted. Furthermore, the maximum charging quantity for the blasting excavation of the tunnel section under the surface buildings are calculated by means of Sadaovsk empirical formula.