Ground vibrations induced by blasting in a shallow buried diversion tunnel can easily cause damage to existing buildings above under complex geological conditions.Controlled blasting is a key technical difficulty to reduce the impact on existing buildings under the premise of ensuring engineering efficiency.In this paper,the influence of blasting excavation on ancient buildings and the characteristics of vibration attenuation are studied by using numerical simulation and on-site vibration monitoring,based on the project of water diversion tunnel under the highway(through Shoushan Temple,Shoufeng Temple section).The results show that the vibration velocity decreases with time and distance from blast center due to the action of plastic zone elements.The combined effect of the angle between the incident p-wave and the vertical direction and the distance from the blast source leads to that the vibration velocities in vertical direction are greater than other directioins.The simulation errors of peak vibration velocites of Shoushan Temple and Shoufeng Temple are 3.7% and 2.3%,respectively,which are consistent with the field test data.According to the monitoring data,due to the large damping of rock mass,the signals have a certain selective absorption effect,and the transmission process of the signals in rock mass produces energy loss,and the vibration velocity is constantly attenuated.The simulation results are consistent with the monitoring results.In addition,the linear fitting method is used to obtain the Sadovsky formula for seismic wave attenuation,which indicates that the numerical simulation method is feasible to predict the vibration effect in advance.