Studies on a method for acquirement of avionics safety-critical airborne software requirements based on software development and management technique, through the studies of software safety method at home and aboard. By giving an example of the ice-preventing subsystem monitoring software in a project, the acquirement method of software safety requirements is explained.%通过对国内外软件安全性分析方法的研究，结合国内软件开发技术和管理方法，探索并提出了一种机载软件安全性需求获取方法。并以某环控防冰系统监测软件为例，给出了软件安全性需求获取方法的应用实例。
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