NOVELTY - Borneol aluminum and aluminum isoborneol are distilled, and isoborneol dehydration rearrangement of camphene is carried to obtain borneol and camphene mixture. Mixture is sublimed to obtain borneol and camphene, respectively. Obtained borneol and camphene are dissolved by saturated hydrocarbon, and silica gel column chromatography is carried out to obtain camphene. Borneol is dissolved in low-boiling point solvent, to obtain high-purity borneol.    USE - Preparation of high-purity camphor, borneol or their reduction product (claimed).    ADVANTAGE - The method efficiently and economically provides high-purity camphor, borneol or their reduction product having high yield, by simple method without affecting the environment.    DETAILED DESCRIPTION - To a secondary alcohol as solvent, aluminum powder and aluminum chloride/iodine/mercury chloride as catalyst are added, and the reaction mixture is heated to obtain secondary alcohol aluminum. Camphor or borneol or camphor reduction product is dissolved in obtained low-boiling point secondary alcohol aluminum at 80-130 degrees C. Camphor or borneol reduction product is dissolved in secondary alcohol solution of aluminum or tertiary alcohol solution of aluminum at 80-150 degrees C, and distilled using low boiling solvent to obtain borneol aluminum and aluminum isoborneol. The obtained borneol aluminum and aluminum isoborneol are continuously subjected to sealed distillation at 130-270 degrees C, and isoborneol dehydration rearrangement of camphene is carried by steam distillation, and cooled to obtain borneol and camphene mixture. The obtained mixture is sublimed at 140-220 degrees C to obtain borneol and camphene, respectively. Obtained borneol and camphene are dissolved by petroleum ether, cyclohexane, or saturated hydrocarbon such as gasoline, and silica gel column chromatography is carried out in presence of petroleum ether, cyclohexane, and saturated hydrocarbon such as gasoline as eluent, to obtain camphene. Borneol is dissolved in low-boiling point solvent such as ethyl acetate and ethanol, to obtain high-purity borneol. Borneol and camphene mixtures, petroleum ether, cyclohexane, and saturated hydrocarbons such as gasoline are dissolved with dimethylformamide/dimethylsulfoxide and other polar solvent, and lower layer is extracted to obtain high-purity borneol. The solvent is recovered from the upper layer to obtain camphene.