Air pumping and inflating device of plastic film continuous sealing machine

The utility model relates to the technical field of film sealing machines, and discloses an air extracting and inflating device of a plastic film continuous sealing machine, which comprises a functional box, two supporting plates are fixedly connected to the front end and the rear end of the bottom of the left side of the functional box, connecting plates are fixedly connected to the two sides between the two supporting plates, and the connecting plates are connected with the functional box. The number of the connecting plates is two. Through cooperative use of a rotating motor, a second threaded rod and a functional block, the rotating motor is operated to enable the second threaded rod to rotate, then the functional block moves left and right, and through cooperative use of a fixing rod, an auxiliary moving block and a limiting rod, the fixing rod can enable the auxiliary moving block to move left and right when the functional block moves left and right; and then a supporting rod at the top of the auxiliary