Supporting bracket device for road construction

The utility model relates to the technical field of road construction, discloses a supporting bracket device for road construction, and solves the problems that crash barriers need to be mounted during current road construction, part of the crash barriers need to be supported by brackets and the angles of the crash barriers need to be adjusted due to different road surface angles when the crash barriers are mounted, and the existing supporting device is inconvenient to use. The technical problem that the installation efficiency of the road surface crash barrier is greatly affected due to the fact that the crash barrier cannot be pushed and pulled is solved, the road surface crash barrier bracket comprises a bracket bottom plate, a fixed supporting plate and a supporting side plate are fixedly installed at the top of the bracket bottom plate, a transmission assembly is arranged between the supporting side plate and the fixed supporting plate, and a motor support is fixedly installed on one side of the fixed su