In the investigation of Baizhu (Atractylodis macrocephala Koidz.) cultivated population in Zhejiang Province, the plant descriptions and the influence of different sits on plant growth, as well as the relationship between the descriptions and commercial class of rhizome were studied. The results showed that the differentiation within a population was large; the correlation between each character was obvious; the commercial rhizome class was significant with some descriptions. And those will provide basic data for improving the variety of Baizhu.