An OLED display apparatus, wherein the OLED display apparatus has a head area and a tail area arranged along an extending direction (d) of the OLED display apparatus, and the OLED display apparatus comprises a middle frame and an OLED screen, wherein the middle frame comprises a bottom plate and a side plate located on a side of the bottom plate, and the side plate is provided, in at least a portion corresponding to the tail area, with a support structure for supporting the OLED screen; the OLED screen comprises a clear film, a display layer, and a packaging cover plate that are disposed in a stacked manner and stacked perpendicular to the extending direction of the OLED display apparatus; the clear film is adhered to the bottom plate by using an adhesive; the packaging cover plate extends beyond the display layer along an extending direction (d) of the OLED screen, wherein the extending direction of the OLED screen is the extending direction of the OLED display apparatus; the OLED screen is provided with a side sealant at least in a portion corresponding to the head area, and the side sealant is adhered to a side end surface of the clear film, a side end surface of the display layer, and a surface that is of the packaging cover plate and that faces the bottom plate; and the OLED screen is adhered to the support structure by using a seam sealant; and the OLED display apparatus has two corners (A1, A2) in the head area, a transition connecting adhesive is disposed between the middle frame and the OLED screen at a location corresponding to each of the corners, and the transition connecting adhesive connects the side sealant and the seam sealant such that the seam sealant, the side sealant, and the transition connecting adhesive form a complete sealing structure on a peripheral side of the OLED screen. the middle frame comprises a bottom plate and a side plate located on a side of the bottom plate, and the side plate is provided, in at least a portion corresponding to the tail area, with a support structure for supporting the OLED screen; the OLED screen comprises a clear film, a display layer, and a packaging cover plate that are disposed in a stacked manner and stacked perpendicular to the extending direction of the OLED display apparatus; the clear film is adhered to the bottom plate by using an adhesive; the packaging cover plate extends beyond the display layer along an extending direction (d) of the OLED screen, wherein the extending direction of the OLED screen is the extending direction of the OLED display apparatus; the OLED screen is provided with a side sealant at least in a portion corresponding to the head area, and the side sealant is adhered to a side end surface of the clear film, a side end surface of the display layer, and a surface that is of the packaging cover plate and that faces the bottom plate; and the OLED screen is adhered to the support structure by using a seam sealant; and the OLED display apparatus has two corners (A1, A2) in the head area, a transition connecting adhesive is disposed between the middle frame and the OLED screen at a location corresponding to each of the corners, and the transition connecting adhesive connects the side sealant and the seam sealant such that the seam sealant, the side sealant, and the transition connecting adhesive form a complete sealing structure on a peripheral side of the OLED screen.