The utility model relates to the technical field of petroleum drilling positioning connector devices, in particular to a screw thread ring type positioning connector. The screw thread ring type positioning connector comprises a body and a screw thread check ring. An axial channel is formed in the body, a first step and a second step are sequentially arranged on the inner wall of the body from top to bottom with the inner diameters gradually increasing, a positioning hole is formed in the lower end surface of the first step, the screw thread check ring is fixedly installed in the portion, below the second step, of the body through threads, the upper end of the screw thread check ring abuts against the bottom face of the second step, and at least one axial circulation hole is formed in the circumference of the screw thread check ring. The screw thread ring type positioning connector is reasonable and compact in structure and convenient, safe and reliable to use; through positioning of the interior of a positioning connector body and a circulation sleeve, the phenomenon that a positioning threaded hole in the positioning connector body is easily washed by high-pressure drilling fluid and therefore the positioning threaded hole is punctured and a short circuit of the drilling fluid is caused is avoided, and underground directional work is safer and more reliable; because the circulation sleeve is axially fixed through the screw thread check ring, operation is facilitated, and assembling and disassembling are better facilitated as well.