Vacuum suction device

The utility model belongs to the technical field of bagging machines, and particularly relates to a vacuum suction device which comprises a frame body, sliding rails are fixed to the two ends of the top of the frame body, sliding blocks are connected into the sliding rails in a sliding mode, a fixing frame is fixed to the top ends of the sliding blocks, a support is fixed to the upper end of the fixing frame, an extending frame is connected to the front end of the support in a sliding mode, and a suction nozzle is installed at the front end of the extending frame. A groove is formed in the upper end of the extension frame, a positioning frame is fixed to the top of the front end of the support, a cylindrical pin is slidably connected into the positioning frame, a pin head is fixed to the end, close to the groove, of the cylindrical pin, a button is fixed to the end, away from the pin head, of the cylindrical pin, and a spring is arranged on the outer wall of the cylindrical pin in a sleeving mode and located