Pneumoperitoneum-free smoke suction drag hook for transumbilical single-port laparoscope

The utility model relates to the technical field of medical instruments, in particular to a transumbilical single-port laparoscope gasless smoke suction drag hook which comprises a drag hook body and a smoke suction piece, and the drag hook body comprises a connecting arm, a first supporting arm connected to one end of the connecting arm and a second supporting arm connected to the other end of the connecting arm. The first support arm and the second support arm are both crossed with the connecting arm, the first support arm or/and the second support arm is provided with a smoke suction piece, one end of the smoke suction piece extends in the length direction of the first support arm or the second support arm, and the other end of the smoke suction piece extends out of the first support arm or the second support arm. The peritoneal cavity expanding device is simple in structure, low in cost and capable of effectively expanding the peritoneal cavity so as to expand the operation space and fully expose the oper