According to the Qinshan nuclear power plant 2nd phase extension engineering, the monitoring and control on blasting vibration were made in the large foundation pit excavation of new expansion nuclear power plant near the operated one. The effective control on blasting vibration was realized by theoretical analysis and monitoring, and the security of the operating nuclear power plant was ensured. The vibration absorption measures summarized in this paper could be reference to blasting vibration control of other nuclear power plant.