Science and technology of Nano scale materials is enriched by developing new synthetic technology and its applications in various fields. Recent development reviews the combustion method which is an efficient and simple method for the preparation of different materials and their composites. Metal oxide-based polymer Nano composites have gained much importance due to their special applications. In addition, interfacial polymerization method has gained its importance in the synthesis of composites by eco-friendly system. Nano sized metal aluminates such as WO3 and WO3 were prepared by a combustion route using poly(vinyl alcohol) as a fuel. Interfacial polymerization method was used for the preparation of polyaniline– WO3 (PANI/WO3) Nano composites. These composites were well characterized for their structures by employing X-ray diffraction tool and morphology by scanning electron micrograph tool, respectively. In-depth morphology of the sample was well studied by transmission electron micrograph tool. The bonding nature of the sample was studied by Fourier transform infrared (FT-IR) study; and the presence of metals in the composites was confirmed by EDX pattern. Electrical and thermal studies of the PANI/ WO3 composites were conducted to understand their electrical and thermal behaviours, respectively. UV–visible and DLS studies of the prepared nanocomposite were also conducted to understand the absorbance and particle distribution, respectively.