Radial drilling machine is a kind of drilling machine in which the rocker arm can rotate and lift around the column, and the spindle box usually moves horizontally on the rocker arm. When machining holes on vertical drilling machine, the alignment of tool and workpiece is realized through the movement of workpiece, which is obviously very inconvenient for some large and heavy workpieces; while radial drilling machine can be aligned by moving the position of tool shaft, which brings great convenience for processing holes on large and heavy workpieces in single piece and small batch production