Abstract: An organic light emitting diode (OLED) display panel and a manufacturing method thereof, an OLED display device are provided, including a display area and a non-display area surrounding the display area, where the OLED display panel also includes at least one ring-shaped barrier protruding from a surface of one side of the non-display area and surrounds the display area and at least one recess recessed on a top surface of the barrier. A cross-sectional shape of the recess includes, but is not limited to, a trapezoidal shape, an arc shape, or a V shape. The manufacturing method of the OLED display panel includes a substrate providing step, a barrier forming step, an exposure development step, and an imprinting step. The OLED display device includes the OLED display panel of any of the above.