POUCH FORMING DEVICE

Provided are a pouch forming method and a pouch forming device. The pouch forming method for forming an accommodation part accommodating an electrode assembly in a pouch sheet comprises a seating process of seating the pouch sheet on a top surface of a lower die in which a forming groove is formed in an upper portion thereof, a vacuum elongation process of elongating a lower portion of the pouch sheet, in which the accommodation part is formed, through vacuum, and an accommodation part formation process of pressing the portion of the pouch sheet, which is elongated through the vacuum, by using a punch disposed above the pouch sheet in a direction in which the forming groove is formed to form the accommodation part.