研究语言信息处理中语境的作用，是目前语言学研究的一个重要课题，已越来越引起语言学界的重视。本文针对手写汉字识别问题，较为详细地分析了不同尺度上语境所起的作用。主要包括作为字形结构整体的字境作用，作为语言上下文的词境和句境作用；并强调了不同层次语境跨越尺度的相互作用。一般而言，本文中所给出的主要观点，也是适用于其它语言现象中类似语境作用分析的。 Studying the role of context in language information processing is an important issue in linguistics research and has drawn more and more attention from linguistics scholars. In this paper, the problem of handwritten Chinese character recognition is analyzed in detail, and the role played by context at different scales is analyzed in detail. It mainly includes the role of the context as a whole of the glyph structure as the context of the language context and the context of the sentence context; and emphasizes the cross-scale interaction of contexts at different levels. In general, the main ideas presented here are also applicable to similar contextual analyzes in other linguistic phenomena.