Reduced graphene oxide based Cobalt Nickel oxide and Neodymium Nickel oxide nanocomposites were synthesized via facile hydrothermal method. The synthesized rGO/CoNiO2 and rGO/NdNiO3 nanocomposites were characterized by various analytical techniques such as XRD, FT-IR, SEM, XPS and UV-DRS. The crystalline size of rGO, NiO, CoNiO2, NdNiO3, rGO/CoNiO2 and rGO/NdNiO3 are found to be 19.8, 43.5, 46.3, 56.2, 50.4 and 64.5 nm respectively. Surface morphologies were examined by using SEM which revealed that agglomerated CoNiO2 and flower shaped NdNiO3 nanoparticles are distributed over the surface of rGO with a 2D sheet structure. The band gap was calculated using UVDRS analysis and the Kubelka - Munk function plot scrutinized that band gap of rGO/CoNiO2 and rGO/NdNiO3 was found to be 3.0 and 2.7 eV respectively. Herein, we have employed methylene blue dye for the photocatalytic degradation purpose using rGO/CoNiO2 and rGO/NdNiO3 nanocomposites and are achieved up to 95% degradation property