Provided are a finishing device for aero-engine bearing rings and a finishing method for distributed aero-engine bearing rings, which belong to the technical field of grinding or polishing devices or techniques, and solve the technical problem of low finishing efficiency of an existing rotary barrel finishing by floating clamp. N suspension assemblies are arranged in a container body, and the centers of the N suspension assemblies are located on a second virtual circle with the center of a bottom wall of the container body as the center of a circle. Through an eccentric arrangement of a bearing ring to be finished, an internal space of the container body is effectively and reasonably utilized, and N bearing rings can be simultaneously finished.

A ceramic ball material according to an embodiment including: a spherical portion; and a band-shaped portion formed over a circumference of a surface of the spherical portion. The ceramic ball material has a ratio Rtb/Rts of 1.0 or more, where Rtb denotes a maximum cross-sectional height of a roughness profile on an outer peripheral surface of the band-shaped portion; and Rts denotes a maximum cross-sectional height of roughness on an outer peripheral surface of the spherical portion.