An ultra-wideband two-ring monopole antenna is presented in this paper. Simulation and measurement results show that, this two-ring monopole antenna can operate very well in the ultra-wideband frequency range of 0.8-10.6GHz, and the wind load dimension is only 35.9% of the circular disc monopole antenna with same diameter. The two-ring monopole antenna can improve the wind resistance capability while maintaining the basic characteristics of the antenna. In addition, this antenna can be manufactured into folding portable antenna with soft metal, owing to the narrow ring width. Therefore, the ultra-wideband two-ring monopole antenna has a high practical value.