The present invention provides an OLED display device and a manufacture method thereof. The OLED display device comprises: a substrate (100); a plurality of first electrodes (200), spaced with one another and arranged in array on the substrate (100); pixel barrier layers (300), located on the substrate (100) and between every two adjacent first electrodes (200); each pixel barrier layer (300) comprises a rut (310) at center, and the rut (310) penetrates the pixel barrier layer (300); an OLED organic material layer (400), located on the first electrodes (200) and the pixel barrier layers (300); the OLED organic material layer (400) is disconnected at the ruts (310); a second electrode (500), located on the OLED organic material layer (400); the second electrode (500) is similarly disconnected at the ruts (310). The OLED display device can inhibit the leaking emitting light problem caused by the leakage current. The short circuit defects can be decreased, and the reliability of the OLED display device is promoted and the display quality of the OLED display device is improved.