According to the vision features in highway tunnels, this paper discusses the principle and standard of luminary design. Throngh the analysis of luminance curve, an improving method is presented, and a luminance curve after improvement is given. 结合公路隧道的视觉特点,探讨了照明设计的原则和标准,并通过对照明曲线的分析,提出了改进方法,给出了改进后的照明曲线。