This　research　presents　the　complex　mechanics　of　the　size-dependent　viscoelastic　carbon　nanotube　(CNT)　subjected　to　the　electric　load.　The　mechanical　model　describing　the　motions　of　CNT　is　formulated　by　the　Euler　beam　theory,　Kelvin-Voigt　viscoelastic　model,　and　nonlocal　continuum　theory.　The　nonlinear　governing　equation　and　end　conditions　are　deduced　by　the　generalized　Hamilton　principle.　The　homoclinic　structure　of　the　CNT　system　is　constructed　using　the　reductive　perturbation　approach　and　the　infinite-dimensional　global　perturbation　method.　Finally,　using　the　extensive　parametric　analysis,　the　impact　of　electric　excitation,　nano-scale　effect,　and　viscoelastic　effect　on　the　complex　mechanics　of　CNT　is　simultaneously　highlighted.　Additionally,　the　comparison　is　also　conducted　with　published　researches　to　test　the　model　and　theoretical　analysis.