Abstract: The effects of burdock (Arctium lappa L.) extracts on spinach's growth and quality were studied by using pot experiment. The results show that fresh weight is increased by 38.3% and 24.7% respectively compared to that of CK treatment after spraying the burdock crude extract or burdock oligosaccharide, while, contents of Vc and total sugar of spinach are increased ,contents of nitrate and oxalate are decreased. Therefore, the burdock crude extract or burdock oligosaccharide could improve spinach's growth and quality. The effects of the burdock crude extract on spinach's growth and quality are better than those of burdock oligosaccharide. In addition, cost of the burdock crude extract is about 1/10-1/15 of that of burdock oligosaccharide. The prospect of the burdock crude extract application in agriculture is better than that of burdock oligosaccharide.