Conductive　hydrogel　has　broad　potential　applications　in　wearable　sensors　and　flexible　electronic　devices.　However,　due　to　the　complicated　and　restrictive　mold-casting　process,　the　manufacture　of　hydrogel-based　sensors　is　still　facing　great　challenges.　In　this　paper,　we　adopt　direct　inkjet　printing　(DIW)　technology　to　fabricate　three-dimensional　structures　of　chemically　and　physically　cross-linked　hydrogels　by　integrating　fumed　silica　as　a　rheological　modifier　into　crosslinked　poly(vinyl　alcohol)/poly(acrylamide)　(PVA/PAAm)　network.　Fumed　silica　not　only　enables　hydrogels　with　excellent　rheological　properties,　but　also　provides　more　hydrogen　bond　crosslinking　sites,　further　improving　mechanical　properties.　Meanwhile,　calcium　chloride　(CaCl2)　is　supplemented　to　construct　conductive　channels　in　the　hydrogel,　which　powers　the　hydrogel　with　good　conductivity　and　strain　sensitivity.　The　sensor　assembled　from　3D　printed　hydrogel　shows　cycle　stability　and　accurate　recognition　ability　in　detecting　mechanical　deformation　and　various　human　movements　(for　example　knee　bending　and　frown).　This　work　extends　the　application　of　3D　printing　hydrogel　in　the　field　of　wearable　devices.