在简述某复合材料在空间领域的应用事例之后,指出改进真空气密性能的必要性。在归纳热固性树脂基复合材料真空气密性问题的特点之后,提出要使复合材料构件在真空度小于10-3Pa等空间环境条件下漏率小于10-10Pa.m3/s、总质量损失小于1.00%、可凝挥发物小于0.10%,应从设计、制造和使用的各个环节采取系统性的措施。随后从材料选择、结构设计、工艺路线设计、工艺方法选择、工艺控制措施、包装、运输、贮存、使用和维护方面,共计介绍了数十条可提升真空气密性能的技术措施,并通过实例验证了技术措施的有效性 After a brief description of the application of a composite material in the field of space, the necessity of improving the vacuum tightness was pointed out. After summarizing the characteristics of the vacuum tightness of the thermosetting resin-based composite material, it is proposed that the composite member should have a leak rate of less than 10-10 Pa.m3 / s under a vacuum environment of less than 10-3Pa and a total mass loss of less than 1.00 %, Condensable volatiles less than 0.10%, from the design, manufacture and use of all aspects of systematic measures taken. Then dozens of technical measures to improve vacuum tightness are introduced in terms of material selection, structural design, process route design, process method selection, process control measures, packaging, transportation, storage, use and maintenance. Verify the effectiveness of technical measures