Bagged product tightness detection device and method

The invention provides a bagged product tightness detection device and method. The device comprises a vacuum pump, a transition chamber, a detection chamber, a detection platform, a pressure sensor, a first cylinder and a second cylinder; the vacuum pump is connected with the transition chamber through a first pipeline; the transition chamber is connected with the detection chamber through a second pipeline; the pressure sensor is arranged on the inner wall of the detection chamber; the detection chamber used for holding a bagged product to be detected is arranged on the detection platform; the first cylinder and the second cylinder are arranged on two sides of the outer wall of the detection chamber; the first cylinder and the second cylinder jointly influence the detection chamber, so that the detection chamber and the detection platform form a closed space. The bagged product tightness detection device and method has the advantages that detection cost can be decreased, detection speed is increased, and the device and the method are applicable to automatic online detection of bagged products on an automated production line.