Shaft part fixing device

The utility model discloses an on-shaft part fixing device which comprises a split type check ring used for making contact with the end face of one side of an on-shaft part so as to fix the on-shaft part, the split type check ring comprises at least two matched arc-shaped sections, and the periphery of the split type check ring is sleeved with a fixing sleeve used for fixing the split type check ring in the radial direction. The split type check ring is adopted, so that the installation is convenient; the axial position of the split type check ring can be effectively fixed by arranging the first annular groove; moreover, the periphery of the split type check ring is sleeved with a fixing sleeve; radial fixing of the split type check ring is achieved through the fixing sleeve; radial separation of each arc-shaped section of the split check ring is prevented; after installation is completed, the axial force of the part on the shaft is transmitted to the split type check ring, the split type check ring transmits