Pulp of litchi (cv. Baila) was used to investigate the changes of membrane lipid peroxidation and the activities of cell protective enzymes during storage at low temperatures. The results showed that the litchi pulp could be maintained well for 40 days at 3℃ or 50 days at -1℃ without symptoms of chilling injury. The cellmembrane electrolyte leakage and malondialdehyde (MDA) content of the pulp stored at 3℃ or -1℃ increasedgradually with time of storage, and showed no marked difference between the two temperature treatments within 30 d of storage．However．the treatm ent at -1℃ significantly delayed the increase of cell membrane electrolyte leakage and MDA content after 30 days of storage．The activities of superoxide (SOD)，ascorbic acid-peroxidase (ASA—POD)，catalase(CAT)in the pulp stored at 3℃reached their peaks at the 20th day and peroxidase(POD)at the 30th day． Storage at -1℃ inhibited the activities of these protective enzymes and reduced their peak values, thereby，significantly slowed down pulp senescence．