The invention discloses an abdominal cavity suction tube. The abdominal cavity suction tube comprises a double-wall tube, a hollow cavity structure is arranged between an outer wall and inner wall of the tube, the top of the far end of the double-wall tube is a four-way snake bone tube, a first annular flowmeter is arranged at the rear end of the rear nodule of the four-way snake bone tube, and the first annular flowmeter is an annularity with thickness and fixed in the hollow cavity between the inner wall and outer wall of the double-wall tube in an embedded mode; holes are formed in both the outer wall and the inner wall of the double-wall tube; a signal line of a pressure sensor of the first annular flowmeter is connected with a controller, four metal wires of the four-way snake bone tube are connected with a motor, the motor is connected with the controller, a three-way tube is connected with the tail portion of the near end of the abdominal cavity suction tube through threads, a negative-pressure suction tube connector and a flushing tube connector are fixed to the three-way tube, and connecting connectors of the metal wires and the signal wire are arranged on the three-way tube. By means of the abdominal cavity suction tube, it is prevented that the suction tube walls suck omentum majus to cause damage to organs of a human body, and the suction effect is improved.