Joint has significant influence on propagation and attenuation of blasting vibration,and relevant research is of great significance for blasting vibration control.In this paper,cement gypsum material was used to make rock similarity model specimen,mica sheet was used to simulate filling joints,single detonator was used as the detonation source to generate blasting vibration signal,and TC-4850 was used to monitor the blasting vibration velocity of incident and exiting waves.The mechanical properties of the selected cement gypsum material were tested,including uniaxial compressive strength,tensile strength,elastic modulus,Poisson ratio,cohesive,internal friction angle.The similarity ratio between the mechanical parameters and limestone was about 20.The conditions set in the test include:1~3 joints as three joint quantity conditions and 20°,40°,60° joint angles as three joint dip angle conditions.Based on the vibration data of incident wave and outgoing wave,the changes of blasting vibration intensity and attenuation rate under different conditions were compared and analyzed.The experimental results show that compared with the blasting vibration velocity data of the complete model,the blasting vibration amplifies in the incident wave region in front of the joint,and the blasting vibration attenuation increases in the outgoing wave region behind the joint.The attenuation of blasting vibration velocity increases with the increase of the number of joints,but the increase is small.However,the attenuation of blasting vibration velocity decreases with the increase of the joint inclination angle,and the variation amplitude is significant.The variation of blasting vibration velocity in horizontal axial direction and vertical direction has the same law and the same change amplitude.