The main purpose of this study is to compare the ultraviolet protection properties of PAN/ZnO and PAN/MWNT composite nanofiber mats at different concentration of MWCNT and ZnO nanoparticles. The nanofiber mats were successfully fabricated in electrospinning. The UV transmission of two types of mats was measured and then the UV protection factor was calculated and compared with each other. The results show that the UV protection factor of the PAN/MWNT composite nanofibers mats of 3 gr/m(2) is better than that of PAN/ZnO at nanoparticle concentrations of 2.5%, while the PAN/ZnO mats of 5% ZnO nanoparticles also provide enough UV protection properties to cover the standard requirements.