The invention discloses a pharmaceutical, cosmetic or medical beauty product freeze-
drying method which comprises the steps that a middle plug is added into a double-cavity clamping type
bottle, a product to be freeze-dried is poured into the double-cavity clamping type
bottle, and the double-cavity clamping type
bottle is placed and fixed to a customized freeze-
drying support; the top plug is placed in the plug pressing
assembly so as to be fixed to the bottle opening of the double-cavity clamping type bottle; performing freezing, primary
drying and secondary drying on the to-be-freeze-dried product respectively; the top plug is fixed by the top cover and the bottle opening is sealed; the plug pressing
assembly comprises a pressing-in jig and a maintaining jig, the maintaining jig is attached to the outer wall of the bottle opening, and the top plug is placed in the maintaining jig so that the top plug can be fixed to the bottle opening; the press-in jig presses the top plug to be embedded into the bottle opening, and the plug pressing
assembly is removed to complete plug pressing. According to the method disclosed by the invention, high-quality freeze-drying parameters and freeze-drying operation can be provided, so that the top plug and the top cover are utilized to complete plug pressing and cover sealing of the double-cavity
cartridge bottle, and the obtained freeze-dried product keeps better appearance and lower
moisture.