The invention provides a display backplate and a display device, including a substrate, a thin film transistor structure layer, a first inorganic passivation layer, a first organic flat layer, a second organic flat layer, and a second inorganic passivation layer, wherein the first organic flat layer is close to the hole sidewall The distance between the center axis is greater than the distance between the sidewall of the first inorganic passivation layer and the center axis. The second organic flat layer is close to the hole sidewall and the center axis. The distance is greater than the distance between the sidewall of the first organic flat layer and the center axis. The second inorganic passivation layer is disposed on the surface of the second organic flat layer and is penetrated by the hole, and covers the second organic flat layer near the hole sidewall, the first organic flat layer near the hole sidewall and the first organic flat layer. The surface of the uncoated second organic flat layer prevents moisture from seeping into the OLED device through the sidewalls of the hole.