Milling and drilling machine with placing rack convenient for scrap iron to leak down

The drilling and milling machine comprises a workbench and a drilling and milling main body arranged in the middle of the upper end of the workbench and used for drilling and milling, and further comprises a U-shaped supporting mechanism arranged on the workbench and connected to the outer side of the drilling and milling main body in a sleeving mode. The supporting mechanism can support the workpiece, and meanwhile scrap iron and iron wires generated by drilling and milling can leak downwards conveniently so that the workpiece can be taken conveniently. During use, the supporting plate is placed on the workbench and arranged on the outer side of the drilling and milling body in a sleeving mode, scrap iron generated during machining can fall onto the supporting plate and leak down through the leaking holes, and therefore most iron wires and the scrap iron fall down and cannot be gathered on the supporting plate, gathering of the scrap iron and the iron wires is avoided, workpieces and tools are convenient to