The invention relates to a dual-band dipole antenna with opening resonance rings. The dual-band dipole antenna comprises a dielectric plate, two V-shaped dipole arms and two opening resonance rings, wherein the opening resonance rings are metal rings with nicks, wherein one V-shaped dipole arm is positioned on the upper surface of the dielectric plate while the other V-shaped dipole arm is positioned on the lower surface of the dielectric plate; one opening resonance ring is positioned on the upper surface of the dielectric plate while the other opening resonance ring is positioned on the lower surface of the dielectric plate; the V-shaped dipole arms on the upper surface and the lower surface of the dielectric plate are in central symmetry; and the opening resonance rings on the upper surface and the lower surface of the dielectric plate are in central symmetry. The V-shaped dipole arms are used for triggering low frequency resonance, and the opening resonance rings are used for beingcoupled with the dipole arms for triggering high frequency resonance, thereby realizing dual-band operation of the antenna.