High-efficiency and high-stability three-axis large-rotation positioner

The utility model discloses a high-efficiency and high-stability three-shaft large-rotation positioner, and relates to the technical field of gyrators. A high-efficiency high-stability three-axis large-rotation positioner comprises a platform bearing bottom plate, a welding clamp mechanism is arranged at the top of the platform bearing bottom plate and comprises sliding plates, the sliding plates are fixedly connected to the two sides of the platform bearing bottom plate, a coaxial positioner is arranged at one end of each sliding plate, and a vertical positioner is arranged at the other end of each sliding plate. The bottom of the vertical positioner is movably connected to the surface of the sliding plate; through the arrangement of the vertical position changing machine, the coaxial position changing machine, the oil cylinder ejector rod and the like, the rotary platform can adapt to tool products with different lengths, adjustment within a certain range is carried out through the oil cylinder ejector rod,