The utility model discloses a highway tunnel illuminating lamp light penetration performance test system comprising a box body, and a to-be-tested light source, a reference light source, a smoke generator and an illuminometer which are arranged in the box body, and the to-be-tested light source and the reference light source are arranged adjacently. By adopting the device, the light penetrabilityof the LED and other light sources under the same smoke concentration can be evolved and compared. For a large color temperature range of the LED lamp, the gain of the color temperature to light penetration is tested.