Buffer film, display device and preparation method of display device

The invention discloses a buffer film, a display device and a preparation method of the display device.The buffer film is used for being arranged on one side of a display panel and comprises a supporting layer, a buffer layer, an isolation layer and a rheological layer, and the buffer layer is arranged on one side of the supporting layer; the isolation layer is arranged on one side, deviating from the supporting layer, of the buffer layer; the rheological layer is arranged on the side, away from the supporting layer, of the isolation layer, the rheological layer comprises a plurality of first protruding parts protruding in the direction away from the supporting layer, and the rheological layer is used for being attached to the display panel. According to the buffer film provided by the embodiment of the invention, the possibility that bubbles which cannot be removed are generated under the condition that the buffer film is attached to the display panel can be reduced, and the display effect of the display dev