Nanocomposite (NC) films of poly vinyl alcohol (PVA) incorporated with varying amounts of Calcium Cadmium doped Aluminum oxide (CaCdAl2O5) nanoparticles (NPs) have been fabricated by solution intercalation technique. TEM result showed the size of NPs between 8-34nm. The effects of NPs content on structural and morphological behaviors of PVA have been established by XRD, FTIR and SEM techniques. Electrical properties of NC films were performed by using LCR-meter. Current (I)-voltage (V) graph displayed that dc-conductivity increased with increasing NPs content and trends of I–V indicate the dominant Ohmic behavior at voltage <5V and above that Poole–Frenkel emission is the dominant conduction mechanism. Ac-conductivity increases with increase in frequency and dosage of NPs. The maximum ac-conductivity obtained in this investigation is 2.43x10-5 S/cm for PVA/8wt% CaCdAl2O5. The reduction in glass transition temperature Tg with increment in NPs contents was observed. The optical behaviors of NCs were deduced by UV visible spectroscopy where the result showed that band gap energy was reduced from 5.23eV to 3.25eV whereas refractive index increased from 1.71 to 2.44 for pure PVA and PVA/8wt% CaCdAl2O5 respectively. The calculated Cspec values show a significant enhancement in Cspec from 1.75F/g for pure PVA to 3.75F/g for PVA/ 8wt% CaCdAl2O5 NCs.