[Objective] The research aimed to study the cold resistance of excellent varieties of Hippophae rhamnoides L.[Method] With 1-year-old branch of 10 varieties of H.rhamnoides as tested material,treatments of 6 temperatures( -15,-20,-25,-30,-35,-40 ℃) were set up with no treatment as CK.The conductance rate and content of MDA of different treatment were determined.[Result] The electrolyte permeability changed as S curve.When temperature was higher than -25 ℃or lower than -35 ℃,the electrolyte leakage rate was ...