According to the blasting demolition program of Yanjia bridge,the blasting vibration test of the civilian buildings around the bridge was carried out,and the obtained data of blasting vibration was analyzed.The results showed that the surface seismic wave incurred by the demolition blasting attenuated faster.The vibration of the structures should be measured in three directions at the same time.In the same blasting,for different structures the change trend of measured points’ vibration velocities in three directions may not be same,but for same structures that is same,and there is a certain degree of amplification effect of blasting vibration.