随着人类航天技术的进步，对航天材料也提出了越来越高的要求，非晶合金(metallic glass, MG)由于其长程无序的特殊结构，有应用于低地球轨道(low earth orbit, LEO)上的巨大潜力。文章介绍了LEO中存在的导致材料失效的主要因素及其产生机制和作用机制，以及航天领域常用的材料种类及其特点；阐述了MG的发展历史、特点及应用前景；分别总结了MG在原子氧、热循环和空间辐照这些不利因素下的结构稳定性和性能稳定性，并以此来评价MG应用于LEO中的可行性；最后展望了未来MG在LEO环境中稳定性的研究方向。

Along with the advancement of human aerospace technology, there are increasingly high requirements on aerospace materials. Metallic glass (MG) has great potential to be applied to low earth orbit (LEO) due to its special structure of long-range disorder. This paper introduces the main factors leading to material failure in LEO, their generation mechanism and action mechanism, the types and characteristics of commonly used materials in aerospace field. The development history, characteristics and application prospect of MG are expounded. The structural stability and performance stability of MG under the adverse factors of atomic oxygen, thermal cycle and space irradiation are summarized respectively, and the feasibility of application of MG in LEO is evaluated. Finally, the future research direction of MG stability in LEO environment is prospected.