The utility model discloses a solar energy tunnel light filling device, assemble the part, conduct the subtotal including the sunlight and disperse the part, assemble the part including outer leaded light mirror, convex lens an and convex lens b, the conduction part is including semitransparent mirror a, semitransparent mirror b and level crossing, disperses the part including concavees lens a, concavees lens b and concavees lens c, convex lens a, convex lens b, conduction subtotal disperse the part and all install in the inside of light pipe, the light pipe is installed at the top in tunnel, outer leaded light mirror is installed in the outside in tunnel, the sunlight light path of outer leaded light mirror reflection and light pipe entrance are on same water flat line. The utility model discloses this kind of renewable resource of make full use of sunlight to consider fully that people's eye driving visual characteristic and road surface shine the effect, according to the driver in the visual adaptation characteristic in tunnel of cominging in and going out, carry out reasonable optimization distribution to leading -in sunlight in the aspect of illuminance and angle etc. Reduce non -renewable energy resource's consumption, energy -concerving and environment -protective.