Catheter set for biliary drainage and intestinal fistula closure after small-intestine anastomosis

The invention relates to the field of medical apparatus, in particular to a catheter set for biliary drainage and intestinal fistula closure after small-intestine anastomosis. The catheter set includes a double-balloon small-intestine catheter device and a T catheter device; and the double-balloon small-intestine catheter device includes an outer catheter and an inner catheter, a double-balloon part and a double-balloon one-way ventilation joint are connected with the outer catheter, a double-balloon fixing ring sleeves the middle of the double-balloon part, a plurality of one-way through holes are formed in the double-balloon fixing ring, first through holes are formed in the middle of the inner catheter, second through holes are formed in the lower portion of the inner catheter, a single-balloon part communicates with the outer wall of the lower portion of the inner catheter, and a single-balloon one-way ventilation joint is connected with the upper end of the inner catheter. By adopting the catheter set fo