Conducting　poly(3-valerylpyrrole)(PVPy)/multi-wall　carbon　nanotubes　(MWNTs)　nanocomposites　have　been　prepared　by　in-situ　polymerization　of　3-valerylpyrrole　(VPy)　on　MWNTs.　The　structure　and　properties　of　the　resulting　samples　are　studied　by　FT-IR,　1H　NMR,　XRD,　SEM,　TEM　and　TGA.　FT-IR,　SEM　and　TEM　indicate　that　no　chemical　reaction　occurred　between　PVPy　and　MWNTs,　and　only　the　MWNTs　serve　as　a　template　for　VPy　polymerization.　PVPy　is　only　coated　on　the　external　surface　of　MWNTs　and　the　thickness　of　the　PVPy　coating　on　each　nanotube　depends　on　the　feed　ratio　of　VPy　to　MWNTs.　XRD　patterns　of　the　nanocomposites　are　investigated,　it　is　clear　that　the　intensity　of　the　peaks　at　around　25.82°　and　43.10°　decreases　with　the　increase　of　the　mass　ratio　of　VPy　to　MWNTs.　Furthermore,　the　electrical　conductivity　of　the　samples　is　measured　at　room　temperature,　and　the　results　exhibit　that　MWNTs　can　enhance　the　conductivity　of　PVPy/MWNTs　nanocomposites　compared　to　PVPy.　The　conductivity　of　PVPy/MWNTs　nanocomposites　is　1.42　S/cm　(VPy/MWNTs=2.5/1)　and　0.22　S/cm　(VPy/MWNTs=5/1),　respectively.