主要目的是：1，除去杂质和非药用部分，保持药材纯净；2，使药材干燥；3，通过加工，分出规格等级，便于按质论价；4，形成一定商品性状。加工药材一般都要达到形体完整，身干无杂，色泽好，不变气、味，有效成分破坏少等。所以，药材加工对中药材商品形成、中药饮片、中成药以及市场流通和临床使用都有重要意义。
The main purposes are as follows: 1. Remove impurities and non-medicinal parts to keep medicinal materials pure; 2. Dry medicinal materials; 3. Through processing, classify specifications and grades to facilitate pricing according to quality; 4. Form certain commodity characteristics. Processing medicinal materials generally need to achieve a complete body, no miscellaneous body, good color, no change in odor, odor, less damage to the effective ingredients, etc. Therefore, the processing of Chinese medicinal materials is of great significance to the commodity formation of Chinese medicinal materials, Chinese medicinal pieces, Chinese patent medicines, market circulation and clinical use.