The present invention provides a double-sided OLED display device, in which two adjacent ones of displaying sections (A) are arranged such that OLEDs of all the pixels (P) located in one of the displaying sections (A) are top-emission OLEDs (D), while the OLEDs of all the pixels (P) located in another one of the displaying sections (A) are bottom-emission OLEDs (D′). A user is allowed to observe normal displaying of images in two opposite directions associated with the front and rear sides of one OLED display device and there is no need to combine two display devices in a back-to-back manner to provide double-sided displaying so that the application range of the OLED display device can be widened, the amount of space occupied by the double-sided display device can be reduced, and aesthetics of the double-sided display devices can be greatly improved.