A method of preparing a patchouli extract is provided. The method includes the following steps. A patchouli material is grounded into patchouli powder and pelleted to obtain patchouli granules. Liquid carbon dioxide is introduced to perform a supercritical carbon dioxide extraction process on the patchouli granules, wherein the extraction pressure is about 110-180 bar and the extraction temperature is about 40-60℃. During the supercritical carbon dioxide extraction process, the extracted product obtained, based on the total weight of the introduced liquid carbon dioxide not exceeding 10 times the weight of the patchouli granules, is collected as the first patchouli extract. The first patchouli extract includes the first patchouli oil. During the supercritical carbon dioxide extraction process, the extracted product obtained, based on the total weight of the introduced liquid carbon dioxide exceeding 10 times the weight of the patchouli granules but not exceeding 15 times the weight of the patchouli granules, is collected as the second patchouli extract. The second patchouli extract includes the second patchouli oil.一種製備廣藿香萃取物的方法。製備廣藿香萃取物的方法包括：將廣藿香原料粉碎成廣藿香粉末並進行造粒，以得到廣藿香顆粒；通入液態二氧化碳以對所述廣藿香顆粒進行超臨界二氧化碳萃取製程，其中萃取壓力約為110~180 bar且萃取溫度約為40℃~60℃；在超臨界二氧化碳萃取製程期間，在所通入的液態二氧化碳的總重量不超過廣藿香顆粒的重量的10倍的範圍內所萃取得到的產物收集為第一廣藿香萃取物，其中第一廣藿香萃取物包括第一廣藿香油；在超臨界二氧化碳萃取製程期間，在所通入的液態二氧化碳的總重量超過廣藿香顆粒的重量的10倍且不超過廣藿香顆粒的重量的15倍的範圍內所萃取得到的產物收集為第二廣藿香萃取物，其中第二廣藿香萃取物包括第二廣藿香油。
