Polarization structure, preparing method thereof and display device comprising same

The invention provides a polarization structure, a preparing method thereof and a display device comprising the same. The method comprises the steps of arranging a metal base layer on the surface of a transparent base; arranging a blocking layer on the surface, away from the transparent base, of the metal base layer, wherein the blocking layer is of a grid structure, and the grid structure comprises grid bars and gaps arranged at intervals; arranging a metal layer on the exposed surface of the metal base layer; removing the blocking layer; removing the exposed metal base layer to form a nano-metal line array. According to the method, the uniformity of nano-metal lines in the nano-metal line array is ensured by means of the uniformity of the grid structure, the nano-metal lines are formed at a time, a multi-layer structure is not needed, technology is simplified, product stability is improved, and the thickness of the polarization structure is reduced to accord with the development trend of lightness and thinness of display devices.