Roadway construction temporary support device and construction method thereof

The invention discloses a roadway construction temporary support device and a construction method thereof. The roadway construction temporary support device comprises a U-shaped support shed, a track walking system, a power system and a net hanging system. The U-shaped support shed comprises a front end U-shaped steel pipe (2), middle U-shaped square steel and a rear end U-shaped steel pipe (16). The front end U-shaped steel pipe (2), the middle U-shaped square steel (15) and the rear end U-shaped steel pipe (16) are parallel to one another and are connected through a connection beam (9) to form a U-shaped shed support. According to the roadway construction temporary support device, the U-shaped shed is used as temporary support equipment, and therefore safety construction in the roadway construction process is effectively ensured; I-shaped steel is utilized for making a walking track on the roadway waist, so that the problems brought when the track walks on a base plate of a roadway due to the severe environment such as the uneven bottom of the roadway and much muddy water existing on the base plate are successfully solved; meanwhile, the net hanging and net laying problems in the temporary support are solved practically.