Center positioner for positioning hip joint and ankle joint

The invention discloses a positioning hip joint and ankle joint center positioner which comprises an ankle fixing mechanism, two telescopic rods, a positioning arc rod, a sliding positioner, a hip joint positioning mechanism and a force line rod. Telescopic rods are arranged on the two sides of the ankle fixing mechanism; the two ends of the positioning arc rod are connected with the far ends of the telescopic rods respectively. The positioning arc rod comprises a sliding groove formed in the inner arc face and metal positioning scales arranged on the outer arc face. The sliding positioner comprises a first sliding block and a second sliding block which are slidably connected to the positioning arc rod in a sleeving mode. A positioning ring is arranged between the ends, close to the inner arc face of the positioning arc rod, of the first sliding block and the second sliding block. The hip joint positioning mechanism is arranged at the groin of the patient; one end of the force line rod is connected with the p