Abstract: In order to prepare a light sound insulation composite, graphene oxide (GO) was used as the filler to prepare GO/nitrile butadiene rubber-poly(vinyl chloride) (GO/NBR-PVC) sound insulation composites by melt-blending process. The morphology, damping and mechanical properties of GO/NBR-PVC composites were measured by SEM, XRD, DMA and universal material testing machine. The sound insulation property was derived by the four-channel impedance tube system. The results show that GO is homogeneously dispersed in GO/NBR-PVC composites, and the elastic modulus, tensile strength and damping property of the composites improve obviously. Sound insulation experiment indicates that the sound insulation property of the GO/NBR-PVC composites increase, especially in the low frequency range. When GO mass fraction is 0.1%, 0.2%, 0.3%, 0.4%, the composite surface density shows little changes, the sound reduction index increase 0.8 dB, 1.1 dB, 1.5 dB, 1.2 dB, respectively. However, when heavy metal (HM) mass fraction is 30%, the surface density increases obviously, but the sound reduction index only increases 0.6 dB.