Positioning structure for drilling and tapping machine

The utility model relates to the technical field of positioning for tapping machines, and discloses a positioning structure for a drilling and tapping machine, which comprises a positioning seat and a tapping machine body mounted on the positioning seat. An elastic abutting piece and an adjustable positioning piece close to or away from the elastic abutting piece are installed on the positioning base, a sleeve is installed on the side, away from the adjustable positioning piece, of the elastic abutting piece, an inserting cavity is formed in the sleeve, and the end of the elastic abutting piece extends into the inserting cavity. The end, away from the elastic abutting piece, of the sleeve is provided with an open hole communicated with the inserting cavity, an elastic scale piece extending into the open hole is arranged in the inserting cavity, and an elastic ringing piece abutting against the inner wall of the open hole is installed on the elastic scale piece. The utility model provides a positioning structu