The air bag type porta hepatis blocker comprises a blocking belt, a ventilation catheter and an inflation device. The blocking belt is connected with the ventilation catheter, and an air bag is embedded in the blocking belt and connected with the ventilation catheter. The blocking band comprises a head part and a free end, the head part is connected with the ventilation catheter, a through hole isformed in the head part, the free end penetrates through the through hole to surround the blocking band into a ring, and the air bag can collide through an air charging device with an air pressure display instrument; compared with the prior art, the device can be conveniently and safely applied to laparoscopic hepatotomy; the laparoscope blocking device is simple in structure, convenient to use,suitable for various operation positions under a laparoscope, free of influence on operation field exposure, capable of achieving complete liver entering blood flow blocking, free of damage to tissue,capable of reducing bleeding risks of a patient in an operation, capable of conducting follow-up research on the influence of different degrees of blocking on a liver resection operation, beneficialto improvement of an existing blocking strategy and low in price.