Abstract: Electrical properties of hybrid polymer thin films, made of Poly Ethylene Oxide PEO doped with conductive Carbon Black (CB) nanoparticles (0.1 wt.%) have been investigated. The observed physical constants of the casted thin films like activation energy were determined. The prepared films by casting method have been electrically. The present study has studying the variation of activation energy with frequency in the range (200-1000 kHz) and temperature in the range (30-55°C) for (PEO) with doped 0.1wt.% carbon black as compared to that case of the un doped (PEO) film. The observed values of the activation Energy (Ea) showed a frequency and temperature. It was found that the activation energy of the prepared thin films decrease with doped (0.1 wt.%) Carbon Black (CB) complexes and that it decrease with frequency and temperature according to polarization processes.