Abstract: The influence of low temperature on the permeability of cell membrane and the extravasation contents of K⁺, Mg²⁺, Ca²⁺and soluble sugar in leaf blade of two cultivars of Jasmimum sambac was surveyed. The results show that the relative permeability of cell membrane and the extravasation contents such as K⁺, Mg²⁺, Ca²⁺and soluble sugar in two cultivars increase with the decrease of processing temperature, the relative permeability of cell membrane in two cultivars increase with the increase of low temperature duration. The above data suggest that the two cultivars of Jasminum sabac will be subjected to freezing injury under subzero low temperature, and Jasminum sabac(sigle petal) is more sensitive to chilling injury than Jasminum sabac(double petal).