The invention discloses a polarized antenna with a reconfigurable directional diagram, and belongs to the technical field of antennas. The antenna comprises an upper-layer dielectric plate, a metal pillar, a lower-layer dielectric plate, a circular antenna, a fan-shaped metal patch and a metal ground, the circular antenna is printed on the upper surface of the upper-layer dielectric plate and is provided with feed ports at the angles of alpha, alpha + 90 degrees, alpha + 180 degrees and alpha + 270 degrees, the circle center of the upper-layer dielectric plate and the circle center of the lower-layer dielectric plate are located on the same axis, the distance between the upper-layer dielectric plate and the lower-layer dielectric plate is 1 mm, the upper-layer dielectric plate and the lower-layer dielectric plate are connected with the feed port through metal supporting columns, four fan-shaped metal patches are printed on the upper surface of the lower-layer dielectric plate, and a metal ground is printed on the lower surface of the lower-layer dielectric plate. According to the antenna, the profile of the antenna can be greatly reduced, the requirement for miniaturization of the wearable antenna is met, and polarization reconfiguration and directional diagram reconfiguration are achieved.