The invention discloses a polarization reconfigurable method of a holographic metasurface antenna of which three states of line polarization, left-hand circular polarization and right-hand circular polarization, of a holographic metasurface antenna can be switched, and belongs to the technical field of antennas. The antenna comprises three parts comprising a polarization non-sensitive holographicmetasurface, a polarization reconfigurable feeding structure and a metal floor, wherein the polarization non-sensitive holographic metasurface is used for radiating a leakage wave, a polarization non-sensitive holographic metasurface structure is obtained by applying and periodic sine modulation onto sub-wavelength unit equivalent refractive index of the polarization non-sensitive holographic metasurface, the polarization reconfigurable feeding structure comprises a cross dipoles loaded with four PIN tubes, a 50-ohm coaxial line is used for directly feeding the polarization reconfigurable feeding structure, conversion among three polarization states of linear polarization, left-hand circular polarization and right-hand circular polarization can be achieved by controlling on / off states of the four PIN tubes, and the metal floor is used for achieving directional radiation of the antenna. The invention initially proposes the polarization reconfigurable design method, which is implementedby the polarization non-sensitive holographic metasurface employing refractive index sine modulation and combined with the polarization reconfigurable feeding structure, of the holographic metasurfaceantenna, the polarization reconfigurable function of the three states of the holographic metasurface antenna is achieved by controlling on / off of a few amount of PIN switches of the polarization reconfigurable feeding structure under the condition that the holographic metasurface radiation aperture is maintained unchanged, and the holographic metasurface antenna has the advantages of a pen conical radiation pattern, high gain, high aperture efficiency, plane, low profile, low cost and the like and is easy to process.