The invention discloses an organic light emitting
display device, a preparing method thereof and a display apparatus. The organic light emitting
display device comprises the components of a substrate; a first
electrode which is arranged on the substrate; a light emitting layer arranged on one side, which is far from the substrate, of the first
electrode; a second
electrode arranged on one side, which is far from the first electrode, of the light emitting layer; and a polarization reflecting layer arranged on one side, which is far from the light emitting layer, of the first electrode, or one side, which is far from the light emitting layer, of the second electrode. Therefore, the organic light emitting
display device, the preparing method thereof and the display apparatus have advantages of improving electrode
reflectivity of the organic light emitting display device, improving brightness and stability of the device, improving polarization characteristic of light which is output from the device, and improving light emitting quality of the device.