Transparent conductive films (TCFs) is high transparency in visible light (λ=380～780nm) with nearly metallic conductivity. They are important materials in functional films because of good conductivity and optical transmittance. In this study, we incorporated Nafion^® into the coating layer of carbon nanotubes (CNTs) to improve the transparent conductive films. The transparency and electrical conductivity properties of the CNTs/Nafion^® thin films were significantly improved by the 3,4-ethylenedioxythiophene (EDOT) incorporation. Carbon nanotubes/Nafion^® (CNTs/Nafion^®) composites are prepared based on filtration technology. CNTs are dispersed in mixed with different amounts of Nafion^® and then driven by ultrasonic. From these mixtures CNTs/Nafion^® composites were dipped in EDOT. The dispersion of CNTs/Nafion^® is characterized by infrared spectroscopy, scanning electron microscopy and UV∇vis spectra. Using the developed process, CNTs/Nafion^® thin films that are uniform and the dispersion of CNTs with Nafion^® connected with one another to form an interweaving films and highly transparent have been fabricated. The resistivity and optical transmittance of CNTs/Nafion^® with EDOT thin film were 82 KΩ/□ and over 69% with optimum condition when the volume of CNTs/Nafion^® was 0.3mL and the ratio of Nafion^® was 2.5%. With the optimization of the composition of Nafion^® composite, CNTs/ Nafion^® thin films might potentially offer better or comparable performances as the conductive oxides.