Current specifications mainly evaluate the highway tunnel service performance in the operation period from the integrity or defect status of tunnel engineering structures and mechanical and electrical facilities, yet fail to fully take into account the durability of tunnel structures or facilities, traffic flow smoothness, riding comfort and other performance dimensions. Therefore, by adopting research methods including literature research, theoretical analysis and expert investigation, an evaluation indicator system for the highway tunnel service performance was established based on the Analytic Hierarchy Process (AHP), and calculation models for each indicator were constructed, thus ultimately realizing the quantitative evaluation of tunnel service performance. Finally, based on the data of 33 ordinary highway tunnels in Shandong Province in 2025, the service performance scores of these tunnels were calculated, and the tunnels were ranked by maintenance priority according to the calculation results. This research provides an important basis for the maintenance decision-making of ordinary highway tunnels in Shandong Province.