A new type of ultra-wide band dual-polarized antenna with simple structure is presented. The antenna uses cross dipole antennas to generate dual polarization, each dipole antenna is composed of two octagonal rings. The stubs are loaded inside the octagonal ring to introduce new resonance frequency points, which greatly increases the bandwidth. The presented antenna has a compact structure with a planar size of only 0.3λL×0.3λL, where λL is the wavelength corresponding to the lowest frequency within the whole working frequency band. An antenna sample has been fabricated and tested. The measured results show that the antenna can achieve Voltage Standing Wave Ratio(VSWR)<2 in 1.24-4.42 GHz. The relative bandwidth is 125% and the pattern bandwidth is 95%(1.24-3.60 GHz). The directional radiation performance is good, and the gain in the pattern bandwidth is greater than 7dB.