Abstract: Glass2fiber cored lead-net ( GF-Pb net) reinforced rubber composites ( GF-Pb/ R) with different st ructures and different interfaces were prepared. And their dynamic properties were studied within 3～20 Hz by testingtheir hysteresis loop s. It tells that the dynamic mechanical property and damping property of GF-Pb/ R are improvedsimultaneously. The increasing ratios of dynamic properties of GF- Pb net vertically reinforced rubber composite(V- GF-Pb/ R) are higher than those of GF- Pb net horizontally reinforced rubber composite ( H- GF- Pb/ R) . Andthe increasing ratios of dynamic stiffness and damping loss factor are 49 % and 25 % for V- GF- Pb/ R with theGF-Pb net volume f raction of 4 %. It is concluded that the damping of GF- Pb/ Rresults from material damping ,micro-slippage damping and damping f rom micro-plastic deformation of lead. The interface bond st rength influencesthe mechanical property and the damping behavior of GF- Pb/ R remarkably. The dynamic stiffness of GF-Pb/ Rincreases with increasing the interface bond st rength. However , the loss factor is a maximum when the interfacebond st rength is between weak bond and st rong bond.