Taking the construction of Yesanguan tunnel on YichangWanzhou railway as an example, the author presents the construction ventilation technology for long tunnels. By adopting jet ventilation technology, the oneend ventilation distance exceeds 8000m. In addition, the author presents the ventilation effect assessment method and dust control method used in the construction of mountaincrossing tunnels. This paper can provide reference for the construction ventilation of similar projects in the future.