In order to study the effects of different hypobaric conditions (0.10, 0.06, 0.04, 0.02 MPa) on storage quality and physiological and biochemical indices of Pleurotus eryngii, the experiment was carried out withPleurotus eryngii as materials, which were vacuum-packed with 0.07 mm low density polyethylene bags, and stored in 4℃. The results showed that, compared with normal pressure (0.10 MPa), hypobaric storage under 0.06 and 0.04 MPa not only reduced the respiration rate ofPleurotus eryngii at different degrees and maintained the activities of superoxide dismutase (SOD) and catalase (CAT), but also inhibited the increase of malondialdehyde (MDA), which delayed aging process, and inhibited the activity of polyphenol oxidase (PPO), which delayed browning degree. So the hardness, springiness, cohesiveness, chewiness and the color of Pleurotus eryngii were better maintained under 0.06 and 0.04 MPa, among which the effect of hypobaric storage under 0.04 MPa was better. It also showed that, from 0.10 to 0.04 MPa, the lower the pressure, the better the effect of the hypobaric storage. But when Pleurotus eryngii was stored under 0.02 MPa, the changes of storage quality did not obey the law. Under this storage pressure, the change law of the respiration rate, the activity of CAT, the hardness of pileus, the springiness and chewiness of pileus and stipe all showed abnormal conditions. At the same time, abnormal conditions were found in the variations of the activity of PPO, the color and the MDA content ofPleurotus eryngiiwhich was stored under 0.02 MPa. The cause of these abnormal conditions may be when the storage pressure was 0.02 MPa, the vacuum degree was higher, and a larger pressure difference was formed. The larger pressure difference caused some mechanical damage and physiological injury on Pleurotus eryngii fruit body. The cell structure was destroyed. And the normal metabolic pathway and related enzyme system were changed under the larger pressure difference condition. This storage condition finally caused that the change laws of the storage quality and the physiological and biochemical indices of Pleurotus eryngii were different from those under 0.06 and 0.04 MPa, and the concrete change law and the dominant cause needed further study. In summary, the hypobaric storage in appropriate pressure range could effectively reduce the respiration rate, and delay the ripening and senescence process ofPleurotus eryngii. The hardness, springiness, cohesiveness, chewiness and the color ofPleurotus eryngii were preferably maintained, and the storage period was effectively prolonged. But too low storage pressure would cause some damage to thePleurotus eryngii fruit body and influence the storage effect. The concrete ultimate pressure value for hypobaric storage of Pleurotus eryngii needs to be determined by further experimental research.%为了探讨不同压力对杏鲍菇减压贮藏品质的影响，以杏鲍菇为试材，采用0.07 mm的低密度聚乙烯袋抽真空减压包装，置于4℃下贮藏，研究杏鲍菇在0.10、0.06、0.04、0.02 MPa 4个压力条件下生理生化及品质的变化规律。结果表明：相对于常压（0.10 MPa），0.06、0.04 MPa在不同程度上可降低杏鲍菇子实体的呼吸强度，保持超氧化物歧化酶（superoxide dismutase，SOD）、过氧化氢酶（catalase，CAT）活性，抑制膜脂过氧化产物丙二醛（malondialdehyde， MDA）含量的升高，延缓杏鲍菇子实体的衰老进程，抑制多酚氧化酶（polyphenol oxidase，PPO）活性，保持杏鲍菇的色泽，以及杏鲍菇的硬度、弹性、内聚性、咀嚼性等质地品质。其中0.04MPa相对于其他压力贮藏效果较佳。0.02 MPa使杏鲍菇的生理生化及品质变化出现了异常。由此可得，适当压力范围内减压贮藏可以有效延缓杏鲍菇的成熟与衰老进程，较好地保持其品质，有效延长其贮藏期。
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