本研究检索自建中国学者SCI论文语料库中高频四词词簇，从类型数、总数方面分析其结构特点，且分别针对中国学者SCI四个分区与自建本族语学者SCI论文语料库进行对比研究。整体上中国学者使用最多的类型是介词、动词短语词簇；与本族语学者相比，中国学者SCI各分区高频词簇的差异集中在使用总数上，特别是在带of的名、介词短语，主、被动态动词短语以及状语从句方面差异较大。本研究可以为中国学者撰写英语学术论文提供重要的参考指导。

This study aims to retrieve the most frequent 4-word clusters in a self-built corpus of academic papers from SCI written by Chinese scholars, i.e. SCI-CH Corpus and to analyze the structural characteristics of these clusters from the perspective of both types and tokens. Besides, this paper makes contrast with native scholars the use of the frequent 4-word clusters in the four sub-corpora of the SCI-CH Corpus. It is found that the most frequently used clusters on the whole are those that incorporate prepositional and verb phrase fragments; the most frequently used clusters in each sub-corpus by Chinese scholars differ significantly in tokens from those used by native scholars, especially clusters from noun phrase with of-phrase fragment, prepositional phrase with of-phrase fragment, the active and passive structures and adverbial clause fragment. Therefore, this study can provide some guidance for Chinese scholars to write academic papers at higher levels.