With the rapid development of the construction techniques in the railway tunnels in China, lots of long tunnels are planned, part of which ( more than 7 km long ) are constructed using the inclined shafts to reduce the boring length of each tunnel. However, due to the consideration of circumstance and investment, some tunnels are bored only in two directions that results in the difficult ventilation in the construction. The design of ventilation in Feiluan tunnel is presented in this paper, which can be reference of other tunnels.