A press puffing device comprising the following components: a piston support, comprising a left cylindrical cavity, a right cylindrical cavity, and a connection portion between the left cylindrical cavity and the right cylindrical cavity, wherein both upper and lower ends of the left cylindrical cavity and the right cylindrical cavity are open; a nozzle holder, comprising a cylindrical inner cavity with a roof, wherein a lateral gas channel is provided on a side wall of the cylindrical inner cavity; the lateral gas channel is connected to an air outlet for air to pass through; and a nozzle holder guide slot penetrating the side wall of the cylindrical inner cavity is provided thereon; and a sealing fixer, comprising a left cavity, a right cavity and a partition wall between the left cavity and the right cavity, wherein a sealing fixer sliding slot is provided on the partition wall; and an inner shape of the left cavity is matched with an outer shape of the nozzle holder; wherein, positional relationships of various components are as follows: the nozzle holder is contained in the left cavity of the sealing fixer; the right cylindrical cavity of the piston support is contained in the right cavity; the sealing fixer sliding slot and the nozzle holder guide slot are configured to overlap each other; the connection portion of the piston support is allowed to pass through and slide upwards and downwards in the sealing fixer sliding slot and the nozzle holder guide slot; the left cylindrical cavity of the piston support is contained in the cylindrical inner cavity of the nozzle holder; a top end of the left cylindrical cavity can be appressed or not appressed with the roof of the cylindrical inner cavity; the lateral gas channel is closed when the top end of the left cylindrical cavity is appressed with the roof, and the lateral gas channel is opened when the top end of the left cylindrical cavity is not appressed with the roof. a piston support, comprising a left cylindrical cavity, a right cylindrical cavity, and a connection portion between the left cylindrical cavity and the right cylindrical cavity, wherein both upper and lower ends of the left cylindrical cavity and the right cylindrical cavity are open; a nozzle holder, comprising a cylindrical inner cavity with a roof, wherein a lateral gas channel is provided on a side wall of the cylindrical inner cavity; the lateral gas channel is connected to an air outlet for air to pass through; and a nozzle holder guide slot penetrating the side wall of the cylindrical inner cavity is provided thereon; and a sealing fixer, comprising a left cavity, a right cavity and a partition wall between the left cavity and the right cavity, wherein a sealing fixer sliding slot is provided on the partition wall; and an inner shape of the left cavity is matched with an outer shape of the nozzle holder; wherein, positional relationships of various components are as follows: the nozzle holder is contained in the left cavity of the sealing fixer; the right cylindrical cavity of the piston support is contained in the right cavity; the sealing fixer sliding slot and the nozzle holder guide slot are configured to overlap each other; the connection portion of the piston support is allowed to pass through and slide upwards and downwards in the sealing fixer sliding slot and the nozzle holder guide slot; the left cylindrical cavity of the piston support is contained in the cylindrical inner cavity of the nozzle holder; a top end of the left cylindrical cavity can be appressed or not appressed with the roof of the cylindrical inner cavity; the lateral gas channel is closed when the top end of the left cylindrical cavity is appressed with the roof, and the lateral gas channel is opened when the top end of the left cylindrical cavity is not appressed with the roof.