Novel inner hole protection combination device for hanger

The utility model discloses a novel inner hole protection combination device for a hanger, which relates to the field of machining and comprises a lining protection sleeve. After the inner control of the hanger is processed, the lining protective sleeve is pushed to a corresponding position, then the two sleeve lengthening rods are connected with the sleeve spanner through the connecting protective sleeve, the expansion screw is rotated through the sleeve spanner to enable the lining protective sleeve to expand outwards and be clamped tightly, and the hanger is fixed through the sleeve spanner. According to the hanger inner control protection device, the inner control of a machined hanger is protected, the risk that the inner control is scratched by scrap iron in subsequent machining is avoided, meanwhile, the risk that the roughness is unqualified and the hanger is scrapped after being scratched is also avoided, and therefore the quality of the hanger in the machining process is improved, and when hangers wi