Packaging bag sealing and cutting device

The utility model is suitable for the technical field of automatic packaging, and provides a packaging bag sealing and cutting device which comprises a support, a cutting device and a cutting device. A driving mechanism; the sealing mechanism is installed on the installation frame and connected with the driving mechanism, the driving mechanism drives the sealing mechanism to be closed or separated, the packaging bag barrel corresponds to the sealing mechanism, and the packaging bag barrel is sealed when the sealing mechanism is closed; the cutting mechanism is mounted on the sealing mechanism and is used for cutting and separating the packaging bag barrel after the packaging bag barrel is sealed, and the cut lower part of the packaging bag barrel becomes a finished packaging bag; and the detection mechanism is mounted on the mounting frame, is connected with the driving mechanism and is used for controlling the driving mechanism to start and stop. When the packaging bag barrel reaches the working position of