Abstract: Shaft forgings are widely used in special equipment industry and machinery industry, shaft forgings need their own rigidity, but also need to withstand the torque generated in the transfer process, coupled with the production process through hot forming, forging internal defects to the force gap sensitivity, easy to produce aging. Firstly, two kinds of shaft forgings which are easy to fail are introduced in detail: centrifugal fan shaft and crankshaft. Secondly,it is found that spherical oxides and sulfides exist in the ingot, inclusions destroy the continuity of steel and produce cracks during forging, and the forgings are caused by the white spot scrap at the heart and improper formulation of post-forging heat treatment process. Finally, the failure mode is controlled by the control of raw materials, the postforging heat treatment process and the reinforcement protection in use.