Abstract: A processing method of water equilibrium variable pressure dried foods includes the following steps: filling up the airtight space of the water equilibrium variable pressure drying device with edible foods and water, discharging air from the space when filling water and blocking the foods, collecting liquid water by gravity to form vacuum storage space, thereby obtaining water equilibrium variable pressure dried foods. A water equilibrium variable pressure drying device comprises a space encircled with wall material (1) capable of preventing fluid from passing, sealable inlet and outlet (2), and water outlet (4). A processing method of water equilibrium variable pressure dried foods enables vacuum storage and vacuum package by the water equilibrium variable pressure drying device. A package for water equilibrium variable pressure dried foods is disclosed, wherein the sealing structure of at least one side or one edge of the package is harmonica-type structure.