The invention discloses a cigarette packaging sealing degree automatic detection device. The cigarette packaging sealing degree automatic detection device comprises a detection bench. An organic glass cylinder is arranged on the detection bench. A rotation platform is arranged at the left side of the organic glass cylinder. The rotation platform is provided with a left automatic lifting platform. The left automatic lifting platform is provided with a supporting frame. The supporting frame is provided with a sealed end cover. The sealed end cover is provided with an upper automatic lifting platform. The upper automatic lifting platform is provided with a supporting column. The supporting column penetrates through the sealed end cover, and an extension end of the supporting column is fixedly provided with a left vacuum chuck whose sucker is downward. The supporting column and the sealed end cover are connected in a sealed sliding manner. A supporting plate is arranged at the right side of the organic glass cylinder. A right automatic lifting platform is installed on the supporting plate. A cigarette packaging machine is installed on the right automatic lifting platform. A movable cylinder capable of moving back and forth between the organic glass cylinder and the supporting plate is installed in front of the supporting plate. A piston rod of the movable cylinder is fixedly provided with a right vacuum chuck. BY adopting the device, cigarette packaging sealing degree detection of different kinds of soft and hard packs is realized, and the leakage point position of a cigarette pack can be determined.