Drilling device for bridge machining

The utility model provides a drilling device for bridge processing, which relates to the technical field of bridge processing and comprises a workbench, a first electric guide rail is fixedly mounted on one side of the workbench, a first right-angle frame is fixedly mounted at the moving end of the first electric guide rail, and a second electric guide rail is fixedly mounted on the lower surface of the first right-angle frame. And a moving plate is fixedly mounted at the moving end of the second electric guide rail. A worker controls the output end of the air cylinder to retract by a certain distance, shuts down a motor, starts an electric push rod and then starts a third electric guide rail, so that a grinding wheel moves to the position below a drill bit along with a second right-angle frame, the surface of the grinding wheel is attached to the surface of a workpiece, and then the worker controls the grinding wheel to rotate; and the rotating grinding wheel can clean burrs around the hole position on the s