▎ 摘　　要

NOVELTY - The utility model claims a freeze drier for preparing graphene oxide powder, specifically relating to the technical field of graphene oxide powder preparation device, comprising a freeze drier main body, the upper part of the freeze drier main body is provided with a sealing ring; the inner side of the sealing ring is provided with a mounting ring; the bottom end of the sealing ring and the mounting ring are fixedly connected with the upper end of the freezing dryer main body; the upper part of one side of the mounting ring is provided with multiple supporting rods; the bottom end of the supporting rod is detachably connected with the upper end of the mounting ring; the upper part of the mounting ring is provided with multiple bottom plates; the outer edge of the bottom plate is provided with a plurality of mounting holes. The utility model is provided with a first connecting rod, an annular block, a second connecting rod, a bolt, a first fixing block, a second fixing block and a screw rod; the rotating screw rod can dynamically adjust the distance of each layer of the bottom plate, which is good for conveniently adjusting the distance between each bottom plate, and will not shake, with simple adjustment and saves time.