The exceptional performance of fiber positions it as a promising candidate for various engineering applications. As an innovative material, Polyoxymethylene-Fiber-Reinforced Concrete demonstrates significant potential in enhancing the dynamic resistance of civil engineering structures subjected to extreme loadings such as blasts, shocks, and impacts. Despite its promising potential, little attention has been given to evaluate the appropriateness of the constitutive model employed in numerical simulations, particularly finite element simulations, to accurately characterize the behaviors of Polyoxymethylene-Fiber-Reinforced Concrete. This study aims to address this gap by modifying the K&C concrete material model, originally designed for conventional concrete structural responses to blast loadings, to achieve a modified material model that is able to provide predictive capability for Polyoxymethylene-Fiber-Reinforced Concrete under blast loading conditions. The investigation begins with a systematic exploration of the mechanical properties of Polyoxymethylene-Fiber-Reinforced Concrete under static and dynamic loading scenarios. Subsequently, the key parameters influencing the K&C concrete material model are calibrated specifically for Polyoxymethylene-Fiber-Reinforced Concrete. In the future phase of the study, the modified K&C concrete material model is validated through numerical simulations and blast tests conducted on Polyoxymethylene-Fiber-Reinforced Concrete Slab subjected to contact explosions. This comprehensive approach aims to improve our understanding and modeling accuracy of Polyoxymethylene-Fiber-Reinforced Concrete behavior under dynamic loading conditions.