This paper investigated the chemical, mechanical, and structural properties of carbon nanotubes by altering their contents in order to be used as component parts for semiconductive shields used in underground power transmission cables. A multi luminescence spectrometer MLA-GOLDS was used to investigate the chemical properties of specimens. In addition, a density meter EW-200SG was used to investigate the mechanical properties of specimens. A FE-SEM S-4300 meter by Hitachi was used to apply dispersions of CNT (Carbon nanotube). As a result, the cl intensity, showing the effects of oxidation, decreased in CNT by approximately 1[wt%], and the density values for semiconductive shield materials with CNT and EEA (Ethylene Ethyl Acrylate) was lower than commercial semiconductive shield materials. Furthermore, dispersion properties showed increases according to the increase in CNT ratio. These properties demonstrated the best conditions at 5wt%. Therefore, it was evident that such exceptional chemical, mechanical, and structural properties could be improved with just a small amount of CNT.