Drilling machine positioning and adjusting device

The invention relates to a drilling machine positioning and adjusting device which aims at solving the technical problem that an existing drilling machine positioning and adjusting device is insufficient in function. A plurality of fixed adjusting rods and a plurality of movable adjusting rods are annularly arranged on the periphery of the mounting base frame at equal intervals in a staggered mode. A gap in the mounting base frame forms a mounting cavity, a plurality of fixing ring seats are sequentially arranged in the mounting cavity, and the fixing ring seats are connected through a plurality of supporting shafts which are annularly distributed at equal intervals; and a positioning arm is movably arranged outside the supporting shaft in a sleeving manner. The device has two operation modes, the dual-mode adjusting mechanism is manually adjusted to be in the needed elastic restoring force or tightening fastening state so as to be matched with the impact drilling and rotary drilling positioning maintaining s