This study investigates the neutron shielding properties of Cellulose Acetate-CdO-ZnO polymer composites with varying concentrations of CdO and ZnO. The research aims to explore materials that offer superior radiation attenuation compared to conventional shielding materials, such as lead, metals, glasses, and polymers. These materials are preferred for their lead-free, lightweight, low-cost, and transparent properties. The neutron attenuation coefficient for all samples was calculated using the Phy-X computer code. The results show that the neutron shielding properties of the composites improve with increasing ZnO concentration, likely due to the lower atomic number of Zn compared to Cd, which allows for more efficient neutron capture. The study concludes that the ZnO concentration is crucial in enhancing the neutron shielding capabilities of the polymer composites.This study investigates the neutron shielding properties of Cellulose Acetate-CdO-ZnO polymer composites with varying concentrations of CdO and ZnO. The research aims to explore materials that offer superior radiation attenuation compared to conventional shielding materials, such as lead, metals, glasses, and polymers. These materials are preferred for their lead-free, lightweight, low-cost, and transparent properties. The neutron attenuation coefficient for all samples was calculated using the Phy-X computer code. The results show that the neutron shielding properties of the composites improve with increasing ZnO concentration, likely due to the lower atomic number of Zn compared to Cd, which allows for more efficient neutron capture. The study concludes that the ZnO concentration is crucial in enhancing the neutron shielding capabilities of the polymer composites.