The utility model discloses a hot melt segmenting device is carried in wrapping bag, including the footstock, the top center position fixed mounting of footstock has the pneumatic cylinder, and the both sides of pneumatic cylinder all are equipped with the sliding seat that welds in the footstock top, slidable mounting has an erection column on the sliding seat, and two erection columns all welded same mount pad with one end, be equipped with the removal seat that welds in the footstock top between one of them erection column and the pneumatic cylinder, and move and offer threaded hole on the seat, threaded hole internal thread installs the screw rod, and the both ends of screw rod are rotated respectively and are installed on two mount pads, and one side that another mount pad was kept away from to one of them mount pad is rotated and to be installed the carousel, and the carousel is connected with the one end of screw rod, the piston rod of pneumatic cylinder is connected with the supporting shoe that is located the footstock below, and the welding of the bottom of supporting shoe has the supporting seat. The utility model is simple in operation, and can carry out the hot melt to the wrapping bag and cut apart, cut apart efficient, simple structure, convenient to use.