This study begins from the tunnel lighting's brightness uniformity, which takes the evaluation standard of detailed rules for highway tunnel lighting design as the constraint condition, and a light distribution model of lamps based on tunnel structural parameters is created using the point by point approach. The simulation tunnel scene is constructed using DIALUX, the tunnel structure parameters are brought into the lamplight distribution model, and a suitable lamp light distribution curve is computed, the designed lamps' lighting performance is confirmed using experiments. The findings demonstrated that the lighting fixtures created with this model can guarantee the tunnel environment's average illuminance, average brightness, brightness uniformity, and longitudinal brightness uniformity match the national evaluation standards. Furthermore, the lighting quality is compared and examined by adjusting numerous tunnel parameters in the experiment (light distribution mode, lamps' installation elevation, and installation spacing), and it is concluded that the designed lamps provide the best lighting quality and energy savings under the initial tunnel parameters. The efficiency of the tunnel lamps light distribution model is confirmed and demonstrates that the model has good application and popularization value in the tunnel lamp design field.