The invention provides a green and energy-saving anti-dazzle 
system for a highway tunnel portal. The green and energy-saving anti-dazzle 
system comprises a structural 
canopy and a controller which are arranged outside the highway tunnel portal, wherein vehicles enter and leave a tunnel through the structural 
canopy; an anti-dazzle unit connected with the controller and used for adjusting the 
transmittance amount automatically according to ambient light brightness is arranged at the top of the structural 
canopy. According to the green and energy-saving anti-dazzle 
system for the highway tunnel portal, the 
transmittance amount of the tunnel portal can be adjusted automatically according to the ambient light brightness, the problem about inside and outside light transition when the vehicles travel in and out of the tunnel portal is solved, the visual 
impact of drastic brightness change on drivers is reduced, not only can the strengthened lighting brightness level of the tunnel portal section be reduced, but also the 
solar energy can be converted into 
electric energy to supply power to the system, meanwhile, power is also supplied to night lighting lamps of the tunnel portal, 
energy consumption of the 
tunnel engineering during operation is reduced greatly, and the functions of energy saving and emission reduction are realized.