The invention discloses a reflection-type polarization separator. The reflection-type polarization separator comprises a medium substrate, wherein the upper surface of the medium substrate is provided with a metal patch unit structure, the lower surface of the medium substrate is provided with a metal back plate, the metal patch unit structure is of an integrated structure formed by arranging two I-shaped elements in a mutually vertical mode, and middle long arms of the two I-shaped elements are crossed vertically. The reflection-type polarization separator has the following advantages that the polarization separator is easy to manufacture and convenient to manufacture in a large scale and is formed in the mode that artificial electromagnetic material basic units are arranged according to a certain rule, and the adopted process is a printed circuit board process; the polarization separator has the advantages of being flexible in design, structure parameters of the basic units are adjusted and accordingly phase delay of waves at different positions can be changed and deflection of different wave directions is achieved.