Drillhole auxiliary device

The utility model relates to a multi-function auxiliary device for drilling holes, which comprises an auxiliary device body and a vertical blocking member, wherein, the top part of the body is dented with a through positioning hole; with the through positioning holem, a guide sleeve and a positioning pin and pivoted and positioned; the rear end of auxiliary device body is provided with a handle; the body is provided with a cover plate correspondingly to the top end of the positioning hole; the corresponding parallel positions of the front and the back end sides of the body and the vertical blocking member are respectively provided with a rabbeting groove seat which is provided with a positioning body which is provided with bridging grooves with different width dimension; the side rear belly part of the body is respectively buried with a screw hole seat; the side rear part of the screw hole seat is respectively and convexly provided with a baffling rib; with the baffling rib, a positioning side plate is pivoted in parallel in a leaning mode. Thus, the utility model can be used for the positioning guiding operation of the drilling and the cutting of various tip holes.