Steel plate drilling and milling device

The utility model discloses a steel plate drilling and milling device, and belongs to the field of steel plate machining, the steel plate drilling and milling device comprises a workbench, the workbench is provided with two sets of clamping assemblies, the clamping assemblies are located at the two ends of the workbench respectively, and one end of the workbench is provided with a conveying crawler belt; the conveying crawler belt and the two clamping assemblies are located on the same horizontal line, a fixing block is slidably connected to the upper portion of the conveying crawler belt, and the fixing block slides vertically. The number of the clamping assemblies on the workbench is two, long steel plates can be clamped from the two ends, the clamping effect is good, the steel plates are stable and not prone to shaking, meanwhile, the long steel plates can be fed through the conveying crawler belt, and the fed long steel plates are fixed in the position of the conveying crawler belt in a downward sliding m