A solid-state reflective display panel and a display device are provided. The display panel includes an array substrate and pixel reflection units disposed on the array substrate. Each of the pixel reflection units includes sub-reflection units. Each of the sub-reflection units includes a heating element, a reflecting layer, a resonant cavity and a phase change material layer, stacked in sequence along a direction away from the array substrate. The sub-reflection units include at least a first sub-reflection unit and a second sub-reflection unit that are adjacent to each other. In one of the pixel reflection units, a first surface is a surface of the first sub-reflection unit away from the heating element, and a second surface is a surface of the second sub-reflection unit away from the heating element. An angle between the first surface and the second surface is less than 180 degrees.