Puncture casing tube for umbilical approach operation

The utility model relates to a puncturing cannula used on a transumbilical approach operation, comprising a puncture sheath, a puncture stabber, and an inner core with at least three operating passages, which is characterized in that one of the operating passages acts as a laparoscope passage, and at least two operating passages are used as the passages for soft apparatuses; the inner core can be arranged inside the puncture sheath, and an air leakage resistant device is arranged at the tail end of each operating passage of the inner core. The puncturing cannula has the advantages of enjoying simple structure and convenient operations, saving the space in a surgery as well as the equipment costs of the hospital, and facilitating a puncturing laparoscope operation.