A gastric diverter and an antibacterial digestive tract catheter thereof are provided. The catheter comprises a membrane tube (31). One end of the membrane tube (31) is connected to a stent (32). The membrane tube (31) is made of an antibacterial material. The membrane tube (31) has an outer diameter of 10-35 mm, and a wall thickness of 0.001-0.3 mm. The membrane tube (31) is fixedly connected to the stent (32) by means of stitching, hot pressing, ultrasonic welding, or laser welding. The antibacterial digestive tract catheter is made of an antibacterial material to minimize occurrences of intestinal inflammation, and to ameliorate metabolic diseases, while also avoiding complications such as liver abscess and pancreatitis. Thus, the invention provides a safer and more effective medical instrument for the treatment of metabolic diseases such as diabetes.
