High-precision rotary table for overhauling LNG (Liquefied Natural Gas) pump

The utility model discloses a high-precision rotary table for overhauling an LNG (Liquefied Natural Gas) pump, which comprises a working table frame, a rotating shaft is arranged in the middle of the working table, the rotating shaft is fixedly connected with the working table frame, the top and the bottom of the rotating shaft are respectively hinged with an upper rotary table and a lower rotary table, and a crossed roller bearing is arranged on the working table frame. A plurality of centering adjusting assemblies are fixedly arranged on the upper turntable; according to the utility model, the concentricity of the wear-resistant ring seat, the shaft sleeve seat and the reference surface of the diffuser can be accurately detected, conditions are created for finish machining before cold sleeving of the wear-resistant ring and the shaft sleeve, the problem that the wear-resistant ring and the shaft sleeve need to be subjected to precision machining after cold mounting during maintenance of the LNG high-pressur