Bending-adjustable ureter guiding sheath

The utility model relates to the technical field of medical instruments, in particular to a bending-adjustable ureter guiding sheath. A bending-adjustable ureter guiding sheath comprises a sheath tube, a bending-adjustable expansion tube and a connector, an inner cavity of the sheath tube is communicated with an inner cavity of the expansion tube and an inner cavity of the connector, and a middle guiding groove which is through front and back and is not communicated with the inner cavity of the sheath tube is formed in the side wall of the sheath tube. The axis of the middle guide groove, the axis of an inner cavity of the sheath tube and the axis of the sheath tube are arranged in parallel, the connector is provided with a rear guide groove with the front end communicated with the rear end of the middle guide groove and the rear end open, and the expansion tube is provided with a front guide groove with the rear end communicated with the front end of the middle guide groove and the front end communicated wit