The invention discloses a precision
machining device for the spherical surface of an
orthopedic implant. A
polishing body is arranged on a base through a horizontal movement mechanism, a coil is fixedto the
polishing body, a
polishing groove is formed in the polishing body,
magneto-rheological polishing fluid is located in the polishing groove, and a rotating mechanism for clamping and rotating apolished part is arranged above the polishing groove. The horizontal movement direction of the polishing body is consistent with the length direction of the polishing groove. The precision machiningdevice has the beneficial effects that the
magneto-rheological polishing fluid is converted into a
solid-like form through a
magnetic field, the horizontal movement mechanism and the rotating mechanism are simultaneously started, the polished part can relatively move in the horizontal direction while rotating, omni-bearing polishing is carried out, automatic polishing is achieved, as the
magneto-rheological polishing fluid is in a
liquid state when not collected in the
magnetic field, the portion between the side wall of the polishing groove and the polished part can be well filled with the magneto-rheological polishing fluid, after the magneto-rheological polishing fluid is converted into the
solid-like state due to the
magnetic field change, the magneto-rheological polishing fluid can polish each fine position of the polished part, the polishing precision is greatly improved, and automatic polishing is achieved.