Self-healing,　adhesive　conductive　hydrogels　are　of　great　significance　in　wearable　electronic　devices,　flexible　printable　electronics,　and　tissue　engineering　scaffolds.　However,　designing　self-healing　hydrogels　with　multifunctional　properties　such　as　high　conductivity,　excellent　mechanical　property,　and　high　sensitivity　remains　a　challenge.　In　this　work,　the　conductive　self-healing　nanocomposite　hydrogels　based　on　nanoclay　(laponite),　multi-walled　carbon　nanotubes　(CNTs),　and　N-isopropyl　acrylamide　are　presented.　The　presented　nanocomposite　hydrogels　displayed　good　electrical　conductivity,　rapid　self-healing　and　adhesive　properties,　flexible　and　stretchable　mechanical　properties,　and　high　sensitivity　to　near-infrared　light　and　temperature.　These　excellent　properties　of　the　hydrogels　are　demonstrated　by　the　three-dimensional　(3D)　bulky　pressure-dependent　device,　human　activity　monitoring　device,　and　3D　printed　gridding　scaffolds.　Good　cytocompatibility　of　the　conductive　hydrogels　was　also　evaluated　with　L929　fibroblast　cells.　These　nanocomposite　hydrogels　have　great　potential　for　applications　in　stimuli-responsive　electrical　devices,　wearable　electronics,　and　so　on.