Electrical and electrochemical properties of PEO based hot pressed nanocomposite polymer electrolyte (1-x)[70PEO:30AgI]:xAl₂O₃ where 0d≤x 10 wt% , have been studied. The conventional Solid Polymer Electrolyte composition (70PEO:30AgI) identified as highest conducting film at room temperature, has been used as 1st phase host matrix and nano-size particle of Al₂O₃ as 2nd phase dispersion. As a consequence of dispersal of Al₂O₃ in host, a conductivity enhancement of was achieved in film 93[70PEO:30AgI]:7Al₂O₃. These composition has been referred to as optimum composing composition. The ion transport behavior in polymer membrane have been discussed on the basis of ionic conductivity(σ), relaxation time (τ), and ionic transferred number(t_ion). The Impedance Spectroscopic study analysis at different temperature have been carried out to characterize the ion transport mechanism. The temperature dependence conductivity study has also been done to compute the activation energy(E_a) form logσ – 1/T plot.