Ventilation device for rail transit tunnel

The invention discloses a ventilation device for a rail transit tunnel. The ventilation device for the rail transit tunnel comprises a bottom plate; two side plates are fixedly installed on the bottomplate; an arc-shaped ceiling is fixedly installed on the two side plates together; a top plate is fixedly installed between the two side plates; an air exchange box is fixedly installed on the top plate; two baffles are fixedly installed in the air exchange box; a first servo motor is fixedly installed in the air exchange box and located between the two baffles; a rotating roller is rotatably installed between the driving end of the first servo motor and the air exchange box; a first rotating rod and a second rotating rod are rotatably installed in the air exchange box; and transmission mechanisms are arranged between the first rotating rod and the first servo motor and between the second rotating rod and the first servo motor. The ventilation device has the advantages that the tunnel canbe well ventilated, air i