Abstract: The finite-element model of three-dimensional steel fiber reinforced ultra-high performance concrete (SF/UHPC) cylindrical specimen was developed on the mesoscopic level by utilizing LS-DYNA, and the mechanical properties and crack development of which under axial compression were numerically simulated. Based on the verification of the validity and rationality of above-mentioned mesoscopic numerical model, the effects of steel fiber volume fraction, aspect ratio, shape and size on compressive strength, toughness and failure mode of SF/UHPC were studied emphatically. Finally, the formula for predicting the compressive strength of SF/UHPC was fitted according to the simulation results. The results indicate that the developed mesoscopic model in this paper for simulating SF/UHPC can well characterize the static performance and damage mechanism of concrete under uniaxial compression stress, and the fitting formula can also predict the compressive strength of SF/UHPC.