A method was designed to fabricate CNTs/PVA hollow helical fiber by controlling the diameter of titanium wire and the carbon nanotube bundles. The resistance of CNTs/PVA hollow helical fiber remaines the same when bending the original 1/3 or stretching to a strain of 100%. The maximum tensile strain of CNTs/PVA hollow helical fiber can reach 600%. After annealing at 500 ℃ for 30 min in argon gas, the residual strain of CNTs/PVA hollow helical fiber reduces from 22% to 2% under 30% strain cycle, improving the mechanical properties.