▎ 摘　　要

NOVELTY - This utility model claims a freeze drier for preparing graphene oxide powder, comprising a quick-freezing chamber and a drying chamber, the quick-freezing chamber comprising a compressor, a condensing chamber, a radiator and a fan, the condensing chamber is set on one side of the quick-freezing chamber, the compressor is set at one side of the condensing chamber, the radiator is set at one side of the compressor, the fan is fixedly connected on one side of the radiator; the drying chamber comprises a drying tray, a heater, a vacuum pump, an exhaust pipe and a switch; the drying tray is embedded on the inner wall of the drying chamber, the heater is fixed on the inner wall of the drying chamber and located on the drying tray above the vacuum pump is set at one side of the bottom of the drying chamber, one side of the vacuum pump is connected with an exhaust pipe, the exhaust pipe extends to the drying chamber outside. freeze drier of the preparing graphene oxide powder greatly improves freezing and drying efficiency, it avoids the occurrence of situation in the drying is not sufficient.