Lectin from 5 culfivars of Chinese jujube was isolated by ammonium precipitation and dialysis. Its ability to induce blood cell aggregation was then evaluated using different blood types （A, B and O）. The results obtained showed that lectin from different cultivars of Chinese jujube had different aggregation-inducing activities for different blood types. For example, the blood cell aggregation valence to blood type A of lectin from Chinese jujube cultivars Huping, HuangHetan and Dabailing reached 2^7 compared with 2^5 and 2^6 for lectin from Chinese jujube cultivars Jun and Huping dates, respectively. Lectin from five different Chinese jujube cultivars were all stable at 70℃. However, when the temperature reached 80 ℃, all of them lose aggregation-inducing ability. Moreover, they had no monosaccharide and oligosaccharide specific binding sites. The metal ions Mg^2＋, K^-, Cu^2＋ and Fe^3＋ were not essential for its blood cell aggregation activity.