Abstract: In recent years, with the rapid development of my country's social economy, the scale of highway construction has continued to expand. As an important part of highway construction, the tunnel is in a relatively closed environment,especially for long tunnels. If an accident occurs, the hazard is extremely great. It is of great significance to improve the monitoring system of the mechanical and electrical equipment of the tunnel and do a good job in the control of the mechanical and electrical equipment, to ensure the safety of highway operation, improve the quality of highway tunnel services, and realize the modernization of highway transportation. To this end, this article describes the control methods and principles of tunnel electromechanical equipment, and conducts control analysis for lighting, ventilation, traffic and other systems in order to comprehensively improve the safety of tunnel operation.