A wireless communication device, comprising: a substrate, comprising a first surface and a second surface; an antenna structure comprising a first antenna unit (120) and a second antenna unit (120) disposed on the first surface, and being perpendicular to each other, wherein each of the first and second antenna units (120 and 120) comprises a first radiation part, a second radiation part, a third radiation part, a feeding part and a feeding line, and the feeding line comprises a first transmission line and a second transmission line that are perpendicular and connected to each other, wherein the first transmission line of the feeding line is connected to the first radiation part via the feeding part; and a metal ground, disposed on the second surface, wherein an isolation slot is disposed on the metal ground, and which position corresponds between projections of the first and second antenna units (120 and 120) toward the metal ground, the metal ground has a first edge and a second edge, wherein the two edges (E1 and E2) are perpendicular to each other, and the first edge is perpendicular to projections of the first radiation part and a portion of the third radiation part of the first antenna unit (120) towards the metal ground, and is parallel to projections of the second radiation part and another portion of the third radiation part of the first antenna unit (120) towards the metal ground, the second edge is perpendicular to projections of the first radiation part and a portion of the third radiation part of the second antenna unit (120) towards the metal ground, and is parallel to projections of the second radiation part and another portion of the third radiation part of the second antenna unit (120) towards the metal ground; and a first resonance slot (132) and a second resonance slot (132), wherein the first resonance slot (132) is disposed between the first edge and a projection of the second transmission line of the feeding line of the first antenna unit (120) towards the metal ground, and wherein the second resonance slot (132) is disposed between the second edge and a projection of the second transmission line of the feeding line of the second antenna unit (120) towards the metal ground, wherein the first and second resonance slots (132 and 132) are L-shaped. a substrate, comprising a first surface and a second surface; an antenna structure comprising a first antenna unit (120) and a second antenna unit (120) disposed on the first surface, and being perpendicular to each other, wherein each of the first and second antenna units (120 and 120) comprises a first radiation part, a second radiation part, a third radiation part, a feeding part and a feeding line, and the feeding line comprises a first transmission line and a second transmission line that are perpendicular and connected to each other, wherein the first transmission line of the feeding line is connected to the first radiation part via the feeding part; and a metal ground, disposed on the second surface, wherein an isolation slot is disposed on the metal ground, and which position corresponds between projections of the first and second antenna units (120 and 120) toward the metal ground, the metal ground has a first edge and a second edge, wherein the two edges (E1 and E2) are perpendicular to each other, and the first edge is perpendicular to projections of the first radiation part and a portion of the third radiation part of the first antenna unit (120) towards the metal ground, and is parallel to projections of the second radiation part and another portion of the third radiation part of the first antenna unit (120) towards the metal ground, the second edge is perpendicular to projections of the first radiation part and a portion of the third radiation part of the second antenna unit (120) towards the metal ground, and is parallel to projections of the second radiation part and another portion of the third radiation part of the second antenna unit (120) towards the metal ground; and a first resonance slot (132) and a second resonance slot (132), wherein the first resonance slot (132) is disposed between the first edge and a projection of the second transmission line of the feeding line of the first antenna unit (120) towards the metal ground, and wherein the second resonance slot (132) is disposed between the second edge and a projection of the second transmission line of the feeding line of the second antenna unit (120) towards the metal ground, wherein the first and second resonance slots (132 and 132) are L-shaped.