<p>In ice mechanics, the strain rate-dependent properties of ice under uniaxial compression have attracted attention. In this work, the ratedependent properties of polycrystalline ice are studied through experiments and numerical simulation. For the experimental part, uniaxial compression tests are carried out on polycrystalline ice with different strain rates. For numerical simulation, a discrete element numerical model based on grain is constructed, and the microscopic parameter calibration is completed. Ice compression at different strain rates is simulated by combining the mechanical properties of single-crystal ice and polycrystalline ice, and the simulation and experimental findings are mutually verified. The results show that the uniaxial compressive strength of polycrystalline ice increases exponentially with the strain rate. The ice samples break substantially at a high strain rate, and the average broken area is inversely proportional to the strain rate. In the crack initiation, propagation, and coalescence of polycrystalline ice, intergranular failure is dominant. In terms of crack type, tensile failure is dominant. On the basis of existing studies, a rate-dependent model of the uniaxial compressive strength of polycrystalline ice is proposed.</p>