本研究借助语料库，从时间、空间和价值三个维度对俄乌外交冲突性话语进行分析，旨在探究趋近化策略运用下的话语合法化及其成因。研究发现：乌方话语的空间趋近化特征强于俄方，二者构建出不同层级的内/外部实体；俄方侧重“过去—现在”时间趋近化，乌方聚焦“将来—现在”时间趋近化；乌方注重“规则”和“西方”价值，俄方则强调“历史”价值。交际博弈下的利益优选、国家身份的社会认知差异导致双方选择了不同的合法化手段。本研究试图揭示话语意义识解背后的意识形态驱动，展现话语与权力、社会现实的互动关系。

Based on corpus, this paper analyzes the diplomatic discourses of Ukraine and Russia to explore how proximization strategies are employed to legitimize their discourses and uncover the underlying reasons. The study reveals that spatially, Ukraine’s diplomatic discourse exhibits a stronger spatial-proximization-dominated feature than Russia’s, with both constructing distinct IDCs and ODCs. Temporally, Russia’s diplomatic discourse emphasizes “past-present” temporal proximization, while Ukraine’s discourse highlights the “future-present” span. Axiologically, Ukraine rationalizes its discourse through values of “regularity” and “westernization”, whereas Russia underscores justice rooted in “historical”values. Differences in interest selection within communicative games and variations in social cognitive perceptions of national identity may account for the distinct proximization features in the diplomatic discourses of the two sides. The findings may reveal the ideological drivers behind discourse legitimization and shed light on the interactions between discourse, power and social reality.