Combined with the data collected from the in - site monitoring of blasting vibration, the characteristics of blasting - caused seismic wave are analyzed comprehensively from its propagation form, propagation mode, properties, attenuation, absorption and the mechanics model of propagation mediums. The results show that blasting - caused seismic wave, which is a very complex random process resembling to be diffence from seismic wave, is a composite wave composed of kinds of waves with different ranges, frequencies and phases. In the propagation processes of blasting- caused seismic wave, complex phenomena such as many times of wave reflection, refraction, diffraction and wave type diversion even wave - guide and layer wave will happen, and relational parameters and time -frequency characteristics of waves are closely related to the conditions of explosion source, physical properties of propagation medium, field charac-teristics and terrain. The dissipation of wave energy caused by the inner friction and heat exchange of viscous - elastic mediums accompanied with its geometry attenuation induces the gradual attenuation of wave energy.