Abstract: This paper has designed two driller parts for vertical driller:one is adjustable bi-axle rack, which can drill and cut two holes at the same time;and the wheelbase of main axle is adjustable;thus it finds wide application and has high efficiency.The other is positioning device of hole gap, which can clamp well-distributed multi-hole parts for drilling and cutting once without drilling-hole mould;thus amplifying the range of application and enhancing processing precision on the basis of no damage to the driller.