In the excavation of small-spaced tunnels,tunnel blasting has a great impact on the stability of the interlaid rock wall,and the construction of the cross passage will further aggravate the vibration damage of the interlaid rock wall.In order to study the vibration response of the interlaid rock wall under blasting,we monitored the vibration velocity of the interlaid rock wall caused by blasting with non-electric detonator in the small-distance tunnel project of Great Wall station of the new-built Beijing-Zhang Jiakou high-speed railway,and then analyzed the attenuation law of the seismic wave in the interlaid rock wall.At the same time,the vibration reduction tests of blasting with electronic detonator have been carried out to study the reasonable delay time of tunnel blasting hole.Through experimental research,some conclusions have been obtained.Firstly,the vibration of the end of the interlaid rock wall has obvious amplification effect due to the influence of vertical and horizontal tunnel segmentation.Secondly,the regression analysis of blasting vibration data by Sadovsky′s formula shows that Kfront