The invention provides a puffed hizikia fusiforme processing device by which impurities can be automatically removed and a puffing process to dried hizikia fusiforme can be carried out. The puffed hizikia fusiforme processing device successively comprises a soaking device, a steaming and boiling device, an automatic sorting device, a drying device and a sterilizing and puffing device. Material transporting mechanisms are disposed among the devices. The automatic sorting device includes a winnowing machine in which materials are separated from impurities according to a weight difference, a magnetic separator in which magnetic metals in the materials are adsorbed and separated through a magnet, and a color selecting device in which the materials is separated from the impurities according to a color comparison difference between a grabbed real-time image and a preset image. The device has following beneficial effects: (1) by means of steam sterilization, a sterilization effect is good and the number of bacteria is far lower than a maximum content specified in a national standard; (2) by means of the multiple automatic sorting method, time and labor are saved and the puffed hizikia fusiforme is greatly improved in quality; and (3) moisture is removed in a vacuumizing manner after a heating and pressurizing operation so that the hizikia fusiforme is puffed like a gas bag, is easy to digest and allows beneficial ingredients to be absorbed conveniently.