The invention discloses a baking method of menthol crystals, comprising the following steps of: placing a crystallization bucket containing wet crystals on a crystal baking frame, placing the crystal baking frame into a crystal baking chamber, starting steam heating, wherein direct steam with the steam pressure of 0.25+/-0.5MPa is used at the beginning, opening a solenoid valve used for controlling the steam when a room temperature reaches 40.5+/-0.5DEG C, setting the controlled room temperature of the crystal baking chamber to be 41.5+/-0.5DEG C, maintaining the steam pressure to be 0.2+/-0.05MPa, and baking for 20+/-0.5 hours at the room temperature of 41.5+/-0.5DEG C; setting the controlled room temperature of the crystal baking chamber to be 42+/-0.5DEG C, maintaining the steam pressure to be 0.15+/-0.05MPa, and baking for 7+/-0.2 hours at the room temperature of 42+/-0.5DEG C; setting the controlled room temperature of the crystal baking chamber to be 36+/-0.5DEG C, maintaining the steam pressure to be 0.1+/-0.05MPa, and preserving the heat for 6+/-0.2 hours; closing a steam valve after finishing heat preservation to obtain the baked crystals as the dry crystals, and screening to select qualified dry crystals as the menthol crystals. The menthol crystals prepared by the invention has the advantages of high yield and good quality.