Practical for use to make a road divider/reflector or a solar collector, a light distribution panel is disclosed to include four faces that can be planar or arched faces and constitute a light distribution curve to control the moving direction of light. When used in a lamp, light is evenly distributed onto the expected illumination area, avoiding formation of Gauss distribution and providing broad area illumination. When used as a road reflector, the light distribution panel provides excellent driving safety effect. When used in a solar collector system, the light distribution panel collects a wide range of incident light.