A dual-polarized radiating element, wherein the dual-polarized radiating element is applicable to an antenna, and comprises: an insulated support structure which is integrated as a whole, wherein the insulated support structure is a solid structure, and comprises a top part, a base, and an intermediate supporting piece (102, 201) that connects the top part and the base; and two radiating arm groups (2a-2d) conformal to the insulated support structure, and two feeding mechanisms corresponding to the radiating arm groups (2a-2d), wherein +/-45 orthogonal polarization is formed between the radiating arm groups (2a-2d) or between two radiating arms (1a-1d, 20a-20d) comprised in the radiating arm group (2a-2d); the feeding mechanism comprises a balun and a feeding plate, wherein a plane on which the balun is located is parallel to a plane on which the feeding plate is located, one end of the balun is electrically connected to a corresponding radiating arm group (2a-2d), and another end of the balun is electrically connected to a ground layer of the base; and the feeding plate is connected to an electric lead on the base of the insulated support structure, wherein the top part of the insulated support structure is a first plane, and the intermediate supporting piece is two vertical planes (2011, 2012) that intersect with each other; the two radiating arm groups (2a-2d) are conformal to a surface of the first plane, each radiating arm group (2a-2d) comprises two radiating arms (1a-1h, 20a-20d), +45 orthogonal polarization is formed between the two radiating arms (1a-1h, 20a-20d) in one of the two groups, -45 orthogonal polarization is formed between the two radiating arms (1a-1h, 20a-20d) in the other group, a head end and a tail end of the radiating arm form an equivalent center line, and an included angle between equivalent center lines corresponding to the two radiating arms (1a-1h, 20a-20d) in each radiating arm group is 180 degrees; and the two feeding mechanisms are respectively located beneath the two radiating arm groups (2a-2d), each feeding mechanism consists of a balun and a feeding plate that are conformal to opposite surfaces of the vertical plane (2011, 2012), one end that is of the balun and that is along a protrusion of the vertical plane (2011, 2012) is electrically connected to a corresponding radiating arm group (2a-2d), and another end of the balun is electrically connected to the ground layer, and wherein the insulated support structure is integrated as a whole by using a mold or by printing. an insulated support structure which is integrated as a whole, wherein the insulated support structure is a solid structure, and comprises a top part, a base, and an intermediate supporting piece (102, 201) that connects the top part and the base; and two radiating arm groups (2a-2d) conformal to the insulated support structure, and two feeding mechanisms corresponding to the radiating arm groups (2a-2d), wherein +/-45 orthogonal polarization is formed between the radiating arm groups (2a-2d) or between two radiating arms (1a-1d, 20a-20d) comprised in the radiating arm group (2a-2d); the feeding mechanism comprises a balun and a feeding plate, wherein a plane on which the balun is located is parallel to a plane on which the feeding plate is located, one end of the balun is electrically connected to a corresponding radiating arm group (2a-2d), and another end of the balun is electrically connected to a ground layer of the base; and the feeding plate is connected to an electric lead on the base of the insulated support structure, wherein the top part of the insulated support structure is a first plane, and the intermediate supporting piece is two vertical planes (2011, 2012) that intersect with each other; the two radiating arm groups (2a-2d) are conformal to a surface of the first plane, each radiating arm group (2a-2d) comprises two radiating arms (1a-1h, 20a-20d), +45 orthogonal polarization is formed between the two radiating arms (1a-1h, 20a-20d) in one of the two groups, -45 orthogonal polarization is formed between the two radiating arms (1a-1h, 20a-20d) in the other group, a head end and a tail end of the radiating arm form an equivalent center line, and an included angle between equivalent center lines corresponding to the two radiating arms (1a-1h, 20a-20d) in each radiating arm group is 180 degrees; and the two feeding mechanisms are respectively located beneath the two radiating arm groups (2a-2d), each feeding mechanism consists of a balun and a feeding plate that are conformal to opposite surfaces of the vertical plane (2011, 2012), one end that is of the balun and that is along a protrusion of the vertical plane (2011, 2012) is electrically connected to a corresponding radiating arm group (2a-2d), and another end of the balun is electrically connected to the ground layer, and wherein the insulated support structure is integrated as a whole by using a mold or by printing.