Tail end thin and soft nephrostomy drainage catheter

The invention discloses a tail end thin and soft nephrostomy drainage catheter and relates to medical instruments used in nephrostomy supporting and drainage. The tail end thin and soft nephrostomy drainage catheter comprises a fistula and a connector. The fistula comprises a thin fistula part which is short and capable of being bent and wound, and a long drainage thick fistula part connected with the thin fistula part. In the pulling out process, if bleeding of a fistulization channel occurs, the fistula can be quickly inserted back, the thick fistula part compresses the wound surface to reduce bleeding of a patient, and time is gained for subsequent handling. For a patient who has accepted percutaneous nephrolithotripsy, the nephrostomy fistula can be slowly pulled out after the patient awakes from anesthesia, and a safety guarantee is provided for trying pulling out the ephrostomy fistula in the early stage. The fistula and the connector are tightly connected through a step structure, and disengagement is