Ventilation inexpressway tunnels is an important component of highways,with significant changes in lighting,unclear visibility,and narrow spatial environments.Tunnel is a special section of the highway that poses a potential risk of traffic accidents,and the design requirements are becoming increasingly high.This paper analyzes and studies the design ideas and methods for ventilation in the northern section of Kaili Ring Expressway.It analyzes the key aspects of highway tunnel ventilation design,including project ventilation design standards,information control of ventilation facilities and other facilities,and selection of fans.