This paper reports the development of health monitoring sensors based on single glass fibers coated with single-walled carbon nanotubes (SWCNT)/-epoxy nanocomposites.Uniform coatings with different SWCNT concentrations are successfully produced by a dip coating method, and the coated single fibers are embedded in a dog-bone shaped epoxy model composite.The shifts of G band in Raman spectra and the incremental changes in electrical resistance of the coating when the composite sample is subjected to tensile loads are related to establish the sensory function of the coated glass fibers.The strain sensitive Raman spectroscopy on CNT coated glass fibers allows accurate evaluation of the stress distributions along the glass fiber/coating interface.