The invention discloses a percutaneous flexible ureteroscopy for complex lesions of the upper urinary tract, which relates to a medical device and is used to solve the problem that the existing ureteral equipment hose is easily missed in the lower ureter, and the pump tube is easy to fall off, resulting in leakage of body fluid. question. It includes percutaneous puncture and dilation equipment, ureteroscope, cold light source, camera system, bedside B-ultrasound machine, intracavitary stone removal equipment, high-pressure balloon dilator, pressure-regulating water pump, holmium laser ureteroscope, and the ureteroscope includes The sheath tube, the hose inside the sheath tube, the push tube used to connect the sheath tube and the hose, the hand grip at the end of the sheath tube, and the cleaning valve. By rotating the combined sheath and hose, it is more suitable for complex kidney stone surgery.