Abstract: In order to study the blasting vibration propagation law of heterogeneous interface，the vibration monitoring of cemented backfill with different strength was carried out by using the research method of model experiment and combining with the actual production of mine. The results show that in the heterogeneous interface，the damping effect of the cemented backfill decreases with the increase of its strength. The damping effect of the cemented backfill with a strength of 3.2 MPa is the worst，and the best damping effect is the cemented backfill with a strength of 0.45 MPa. When the blasting seismic wave propagates outward，its propagation direction and path will change，and its waveform will be converted to each other. It is observed that the cemented backfill with a strength of 0.45 MPa has the strongest reflection ability and the weakest transmission ability，while the cemented backfill with a strength of 3.2 MPa has the weakest reflection ability and the strongest transmission ability.

Key words: heterointerface, blast vibration, vibration reduction ratio, transmission capacity