An organic light emitting diode (OLED) display panel including a TFT substrate is provided. The TFT substrate is provided with an OLED device layer thereon, and the OLED device layer is provided with a TFE encapsulation layer thereon. Two ends of the TFT substrate is respectively provided with a first retaining wall, which is provided with a first organic adhesive layer thereon. A transverse dimension of the first organic adhesive layer is greater than that of the first retaining wall disposed thereunder. Thus, a portion connecting the first organic adhesive layer and the first retaining wall are formed into a concave wedge-shaped structure. The OLED device layer and the TFE encapsulation layer are located between the two first retaining walls and the two first organic adhesive layers disposed thereon. A side encapsulation structure adopted can improve ability of the sides of the OLED display panel to block water and oxygen.