Abstract: In order to improve the energy absorption performance of the tunnel buffer layer filling material, combined with the high tensile strength and high ductility of polyvinyl alcohol (PVA) fiber and the excellent energy absorption capacity of foamed polypropylene (EPP) material, a PVA fiber EPP concrete was prepared. Based on the requirements of the mechanical properties of the tunnel buffer layer material, a three-factor and three-level orthogonal test was carried out to analyze the main factors affecting the energy absorption performance of the concrete and the optimal mix ratio of each component. Furthermore, static tests were carried out on 10 different proportions of PVA fiber EPP concrete to systematically evaluate its mechanical properties and quantitatively analyze its quasistatic energy absorption performance. The results show that the failure mode of the reference group E0 sample is typical brittle failure, while the failure mode of the sample is transformed into ductile failure after adding PVA fiber and EPP particles. The volume content of EPP has a significant effect on the axial compressive strength, elastic modulus and confined uniaxial compressive strength of concrete, while the content of PVA fiber plays a leading role in splitting tensile strength and Poisson 's ratio. The stress-volumetric strain curve analysis based on confined compression shows that E60-P18-1.2 concrete exhibits the best energy absorption performance.