The utility model discloses a tunnel center drain pipe, including the reinforced concrete pipe body, the body cross section is the arch, and the body bottom is the plane, and the perpendicular to can further be followed to the body bottom the pipe length direction has first pterygoid lamina and second pterygoid lamina to body both sides extension respectively, will through the mounting the body is fixed inverted arch structure upper portion, or directly set up the body in the ditch inslot of inverted arch structure bottom center below. The utility model discloses a tunnel center drain pipe cross sectional shape is not circular, can make to execute to do the step and can simplify to leave out executing of central drain pipe tube socket and do, place central drain pipe and can carry out process on next step on inverted arch structure plane or slot bottom plane, simplified the process. Simultaneously, still can avoid the rotation of central drain pipe, made that it can remain stable, straight and elevation requirement in follow -up work progress, prevent the jam of outlet, guarantee the ability of permeating water of central drain pipe from this.