An organic light-emitting diode (OLED) display panel and an OLED display device are provided. In the OLED display panel, a thickness of an electronic layer is set to be less than a first default value, and/or a material mobility of at least one of the electronic layer or a common electrode layer is set to be greater than a second default value. The electronic layer and the common electrode layer can be formed by one metal mask, so a manufacturing efficiency of the OLED display panel can be improved, and a cost can be reduced, and meanwhile, the common electrode layer and metal terminals can be normally conducted to each other, allowing the OLED display panel to work normally.