The invention discloses a reflection-type sunshine illuminating system. The reflecting-type sunshine illuminating system comprises a light collecting device, an optical fiber coupler, a fiber optics bundle, and a semi-light-penetrable semi-trans-form light conduction lighting device, wherein the optical fiber coupler is connected with the light collecting device and is used for enabling sunshine which is collected through the light collecting device to be coupled in optical fibers, the fiber optics bundle is connected with the optical fiber coupler, and the semi-light-penetrable semi-trans-form light conduction lighting device is connected with the fiber optics bundle. The semi-light-penetrable semi-trans-form light conduction lighting device comprises a light guiding pipe and a plurality of semi-light-penetrable semi-trans-form prisms, wherein the plurality of semi-light-penetrable semi-trans-form prisms are arranged inside the light conducting pipe in a distributing mode at intervals. A light outlet is formed in the bottom portion of the light guiding pipe of the semi-light-penetrable semi-trans-form light conduction lighting device and a diffusing device is installed at the portion of the light outlet. The reflection-type sunshine illuminating system is simple in structure, reasonable in design, low in realizing cost, and capable of being widely applied to the fields such as gymnasium illumination, market illumination, underground illumination, underwater illumination, tunnel illumination, and road illumination. Besides, the fields of development and utilization of solar energy and the utilization rate are improved.