Holographic display panel, holographic display device and display method thereof

The invention provides a holographic display panel, a holographic display device and a display method thereof, relates to the technical field of display, and is used for realizing dynamic holographic displaying. The holographic display panel comprises a plurality of field depth display units, wherein each field depth display comprises at least two pixels which are adjacent; each pixel comprises a plurality of sub pixels; each field depth display unit further comprises a plurality of phase plates; each sub pixel corresponds to a phase plate in the light exiting direction; and the phase plates are used for controlling diffraction angles of light exiting from the phase plates. The diffraction angles of the various phase plates corresponding to the sub pixels in the same pixel are the same, and the diffraction angles of light, which exit from the phase plates, of the different pixels in the same field depth display unit are different, so that oppositely elongated lines of the light exiting from the same field depth display unit are intersected at a field depth position.