Abstract: The preparation technology and performances of carbon nanotubes/natural rubber composites were studied. After the carbon nanotubes were added into natural rubber matrix, the area of crystal-melting peak of DSC curve of rubber decreases. At the same time, the scorch time of rubber shortens slightly, and the curing reversion reduces. The dispersing of carbon nanotubes in rubber and the adhesion between carbon nanotubes and rubber are improved after being treated with the dispersing-bonding system. The mechanical properties of carbon nanotubes composites increase. The rebound degree and the dynamic compress properties of carbon nanotubes composites are more superior to those of natural rubber filled with carbon black. Compared with the sample filled with carbon black, the storage modulus and the glass transition temperature of carbon nanotubes reinforced composites are higher, and the thermal stability is also preferable.