Abstract <p>This article analyzes the deformation properties of concrete with non-metallic fibers (coconut and cane) and steel fibers. Using two variables of normal stress (σ_v/MPa) and different concentration of fiber content (<i>r</i>/%), a computational experiment was carried out. During the experiment, the properties of fiber-reinforced concrete samples with coconut, reed and steel fibers and reference concrete samples for tension, bending and compression were compared. The experiments led to the conclusion that all types of fibers can improve the mechanical properties of structural concrete. An analysis of the test results showed that the best way to improve the mechanical properties of concrete is to add 2% reed or coconut fiber and 1.5% steel to the concrete mixture. During the experiments, it was found that due to the impact strength of metal fibers, the compressive results of samples with steel fiber are much higher than for samples with plant fibers, while the bending strength and tensile strength are higher for samples with non-metal fibers. According to the results of the experiments, the relationship between the mechanical stress of fiber-reinforced concrete is as follows: concrete with steel fibers &gt; concrete with reed fibers &gt; concrete with coconut fibers.</p>