Highway engineering formwork supporting device

The utility model discloses a highway engineering formwork supporting device, which comprises a fixing plate, an adjusting mechanism, fixing mechanisms and a supporting plate, the adjusting mechanism is arranged on the upper surface of the fixing plate, a rack is arranged on the side surface of the fixing plate, and the fixing mechanisms are arranged on the side surface of the fixing plate and located on the two sides of the rack. A supporting plate is movably connected into the fixing plate. The adjusting mechanism comprises a sliding block, a worm, a rotating shaft, a first gear, a second gear, a transmission rod and a pulley, the sliding block is movably connected to the upper surface of the fixing plate, the worm is movably connected to the interior of the sliding block, the rotating shaft is movably connected to the lower surface of the sliding block, and the first gear is fixedly connected to the surface of the rotating shaft. A second gear is fixedly connected to the surface of the rotating shaft and l