Porous positioning machining device for stand column of bench drill

A bench drill stand column multi-hole positioning machining device comprises a first base and a second base fixed to one side of the first base, the upper side of the second base is provided with a positioning piece suitable for stand columns of various sizes, the first base is provided with a clamping piece corresponding to the stand columns of various sizes, the first base is provided with a drilling piece with the adjustable angle, and the drilling piece is provided with a drilling hole. The clamping piece comprises two clamping plates, clamping rods are symmetrically arranged on the clamping plates, a circular ring is fixed to one end of each clamping rod, a pressing rod is rotationally arranged in the circular ring, a notch is formed in the outer surface of the pressing rod, grooves are formed in the inner walls of the two sides of the notch, and a plurality of first rotating rods are rotationally arranged in the grooves; the first rotating rods are connected through a first conveying belt, a plurality o