[Objective]This paper analyzes and summarizes the main methods, related features and evaluation methods of keyword extraction research to provide reference for future studies.

[Coverage]We used various sources such as WOS, DBLP, EI, Google Scholar、CNKI and Wanfang Data to search literatures with the keywords “keyword extraction”, “keyword generation”,“keyphrase extraction”,“keyphrase generation” etc. We then collected 111 representative literatures in conjunction with personal accumulation and back and forth method.

[Methods] Combing the development of keyword extraction, this paper analyzes and summarizes the related research of keyword extraction from three main aspects: research methods, related characteristics and evaluation methods.

[Results] This paper summarizes the general model of keyword extraction methods, analyzes the development trend of keyword extraction methods and the main evaluation methods of keyword extraction combined with the development of related features of keyword extraction.

[Limitations] This paper pays more attention to the mainstream methods of keyword extraction.

[Conclusions] This paper analyzes the three main contents of keyword extraction, and summarizes the key problems and development direction of the research.