Because the phenols and polysaccharides in Ivy are rich,it is difficult to obtain high-quality total DNA from its tissues.In the paper,the total DNA of Ivy was extracted from its leaves,and the different extractingmethods were compared.The extractingmethods of total DNA of ivy were improved and optimized for clearing away polysaccharides effectively.The results showed that the CTABmethod,the SDSmethod,and the improvedmethods can extract total DNA.But the improvedmethods were better than the conventional CTA...