Positioning device

The utility model relates to the technical field of oral implant positioning, and discloses a positioning device which comprises a first fixing ring and a second fixing ring, and the end parts of the first fixing ring and the second fixing ring are respectively connected with a first rotating rod and a second rotating rod through hinges. According to the positioning device, through cooperative arrangement of a first fixing ring, a second fixing ring, a first rotating rod, a second rotating rod, a first fixing plate, a second fixing plate, a threaded rod, a hand rocker, a fixing rod, a sliding plate and a sliding block, when the positioning device is used, the first fixing ring and the second fixing ring are in lap joint with the gum of a patient respectively by a worker, and the worker rotates the hand rocker; a hand rocker rotates to drive a threaded rod to rotate, due to limitation of a fixing rod, a first fixing plate and a second fixing plate move on the threaded rod during rotation, a first fixing ring a