Maintaining tool for roll ball delivering base plate

The utility model provides a maintaining tool for a roll ball delivering base plate. The maintaining tool is used for maintaining the roll ball delivering base plate, and the roll all delivering base plate comprises a plate body, a spring, a roll ball and a protective ring, wherein the spring and roll ball are installed in holes of the plate body, and the protective ring is installed on the plate body and is capable of positioning the roll ball. The protective ring is provided with at least two positioning holes. The maintaining tool for the roll ball delivering base plate comprises a roll ball pressing device and a spanner, wherein the roll ball pressing device is used for pressing the roll ball, and the spanner is used for screwing the protective ring. The spanner comprises a spanner head and a hand shank which are mutually connected. At least two protrusions are arranged on the surface of the spanner head, and can partially enter the positioning holes.