Polymer concrete (PC), because of its good vibration alleviating properties, is a proper material for elementary machine parts in high-precision machine tools. Strengthening fibers were applied in PC to improve its mechanical properties, and the material obtained is called fiber reinforced polymer concrete (FRPC). The best parameter to estimate the vibration alleviating property is damping ratio. Orthogonal tests were carried out to prepare FRPC specimens with different fibers. How strengthening fibers affect vibration alleviating properties of FRPC was studies basing on the experiment results.