甲壳素是无脊椎动物外骨骼和真菌细胞壁的主要结构成分,在自然界中是仅次于纤维素的第二大类生物材料,几丁聚糖是甲壳素脱乙酰基的产物,是一种天然阳离子聚合物,无毒无害,安全可靠,易生物降解.几丁聚糖的工业化生产方法为化学提取法.分别介绍了以虾蟹壳、真菌、其他动植物为原料的生产工艺.“,”Chitin is the main structural component of exoskeletons of invertebrates and the fungal cell wall,and the second largest biomaterial in nature except cellulose. Chitosan is deacetylated product of chitin,and a natural cationic polymer,non-toxic,safe and reliable,readily biodegradable.The Industrial production method of chitosan is chemical extraction.The production processes were introduced respectively using shrimp,crab shells,fungi and other plants and animals as the raw material.