As a new type of green and environmentally friendly protective material, Polyurea exhibits excellent properties including good mechanical properties, easy application, broad adaptability, strong impermeability, and high abrasion resistance. The work aims to focus on analyzing the mechanical properties of polyurea materials subject to moisture and heat treatment. Quasi-static tensile tests were conducted on polyurethane materials treated at different temperatures under 100% humidity by the GL-028 universal testing machine and the Split-Hopkinson Pressure Bar (SHPB) was used to perform dynamic tensile tests. The stress-strain curves of the polyurethane materials at different strain rates were obtained. Compared to the 20 ℃ moisture and heat coupling condition, the mechanical properties of polyurea specimens treated at 30, 40, 50, and 60 ℃ decreased by 0.11%, 0.21%, 0.26%, and 0.31% respectively under quasi-static tensile conditions. The stress-strain curves of polyurea displayed significant non-linear characteristics, including initial linear elastic stage, high elastic stage, and densification stage. Under dynamic tensile conditions, the reduction in mechanical properties was 3.5%, 10.6%, 12.5%, and 16.6% respectively. Due to the continuous decrease in energy during stress wave propagation, the strain hardening rate of polyurea under dynamic conditions differed from that under quasi-static conditions, showing a decreasing hardening characteristic and stress wave dispersion phenomenon. The experimental results indicate that the polyurea material has excellent protective performance and its mechanical properties show a relatively small decrease with the increasing temperature, demonstrating good moisture and heat resistance.