Syrup fresh-keeping device and method

The invention discloses a syrup preservation device and method, and belongs to the technical field of storage tools. A syrup preservation device comprises a bottom plate, two side plates are fixed to the side face of the top end of the bottom plate, a storage barrel is arranged between the two side plates, a shaft rod is rotationally connected with the side plates, a handle is fixed to one end of the shaft rod, a mortise lock assembly is arranged on the handle, the top end of the storage barrel is covered with a cover plate, and a sealing assembly is arranged between the cover plate and the storage barrel. A stirring assembly is arranged in the storage barrel. According to the syrup storage device, the cover plate is sealed through overall expansion of the sealing assembly, the sealing performance and the storage effect of syrup storage are effectively improved, the storage barrel is driven to rotate through the mortise lock assembly, so that a top end opening of the storage barrel is inclined, the top end op