In the experiment，seeds of potato（Kexin No13）soaked with different concentration of borax was used in pot culture to study the effect of borax on the potato seedling quality through measuring potato seedling morphogenesis，matter accumulation，sugar metabolism and related enzymatic activity in dry areas of west Heilongjiang field.The results showed that appropriate concentrations of borax（0.5 ~2.0 mg·L1）improved seedling quality through effectively increasing the potato plant height and stem diameter，improving aerial and subterranean dry matter accumulation，promoting sugar metabolism and related enzymatic activity of potato leaf.When borax concentration was more than 5.0 mg·L-1，the normal growth of potato seedlings was restricted，and quality of potato seedling was affected.