This study investigates the neutron shielding properties of Cellulose Acetate-CdO-ZnO polymer composites with varying concentrations of CdO and ZnO. Cellulose acetate serves as a biodegradable matrix, while CdO and ZnO are used for their radiation absorption properties. The neutron attenuation coefficient was calculated using the Phy-X computer code for all samples. Radiation shielding is crucial in many facilities, requiring materials with superior attenuation properties compared to conventional materials. Polymer composites offer a promising solution due to their multiphase nature, which can enhance shielding properties. The study used a CdO-ZnO-Ca composite, with Ca content constant and CdO and ZnO concentrations varied. The neutron shielding properties were determined based on the Beer-Lambert law, and the results showed that increasing ZnO concentration improved neutron shielding. This is attributed to Zn's lower atomic number, which allows it to capture neutrons more effectively than Cd. The results indicate that ZnO concentration significantly affects the neutron shielding properties of the polymer composite. The study concludes that ZnO is an important component in achieving effective neutron shielding in polymer composites. The research is ethically approved and has no conflicts of interest. Data are available upon request from the corresponding author.This study investigates the neutron shielding properties of Cellulose Acetate-CdO-ZnO polymer composites with varying concentrations of CdO and ZnO. Cellulose acetate serves as a biodegradable matrix, while CdO and ZnO are used for their radiation absorption properties. The neutron attenuation coefficient was calculated using the Phy-X computer code for all samples. Radiation shielding is crucial in many facilities, requiring materials with superior attenuation properties compared to conventional materials. Polymer composites offer a promising solution due to their multiphase nature, which can enhance shielding properties. The study used a CdO-ZnO-Ca composite, with Ca content constant and CdO and ZnO concentrations varied. The neutron shielding properties were determined based on the Beer-Lambert law, and the results showed that increasing ZnO concentration improved neutron shielding. This is attributed to Zn's lower atomic number, which allows it to capture neutrons more effectively than Cd. The results indicate that ZnO concentration significantly affects the neutron shielding properties of the polymer composite. The study concludes that ZnO is an important component in achieving effective neutron shielding in polymer composites. The research is ethically approved and has no conflicts of interest. Data are available upon request from the corresponding author.