A balloon puncture trocar, comprising a seal component (10), a balloon cannula component (20), and a retaining ring component (30). The balloon cannula component (20) comprises a cannula (200), a gas injection valve (202), a balloon cover (203), a balloon switch (205), a push rod (206), a push rod seal (207), and a balloon tube (211)； the cannula (200) has a gas injection hole, a gas storage chamber (2000), and a gas groove (2001)； the gas injection valve (202) and the cannula (200) are fixedly connected at the gas injection hole； the balloon cover (203) and the gas storage chamber (2000) are fixedly connected； the push rod (206) and the push rod seal (207) can move up and down in the gas storage chamber (2000)； the balloon switch (205) can move back and forth in the balloon cover (203)； the balloon tube (211) has a balloon (2110) and is sleeved on the cannula (200)； gas in the gas storage chamber (2000) can enter into the balloon (2110) by means of the gas groove (2001)； the retaining ring component (30) is sleeved on the balloon cannula component (20) in a movable or fixed connection manner. The balloon puncture trocar is simple in structure, convenient to use, has low operational difficulty, and can shorten the operating time.L'invention concerne un trocart de perforation de ballonnet, comprenant un composant de joint d'étanchéité (10), un composant de canule de ballonnet (20), et un composant de bague de retenue (30). Le composant de canule à ballonnet (20) comprend une canule (200), une soupape d'injection de gaz (202), un couvercle de ballonnet (203), un commutateur à ballonnet (205), une tige de poussée (206), un joint de tige de poussée (207), et un tube de ballonnet (211) ； la canule (200) comporte un trou d'injection de gaz, une chambre de stockage de gaz (2000) et une rainure de gaz (2001) ； la soupape d'injection de gaz (202) et la canule (200) sont reliées de manière fixe au niveau du trou d'injection de gaz ； le couvercle de ballonnet (203) et la chamb
