This machine adopts the work form of fixed work table and moving gantry. It mainly used for drilling steel plate workpieces in steel structures such as buildings, bridges, iron towers, etc., and it can also be used for drilling holes for tube sheets, baffles and round flanges in the boilers, petrochemical industry; the maximum processing thickness is 100mm, and thinner plates can also be stacked in multiple layers for drilling. Through holes are also can be processed. The maximum range of clamping for workpiece is 3000×1600mm.