Because the scientific citation index is based on Bradford's literature dispersion theory and E. Garfield's citation analysis theory, through the statistics of citation frequency of papers, the academic journals and scientific research achievements are evaluated and studied in many directions, so as to judge the scientific research output performance of a country or region, scientific research units and individuals and reflect their international academic level. Therefore, SCI is an internationally recognized scientific and technological literature retrieval tool worthy of reference.

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Scientific citation index is one of the most famous retrieval publications in the world, and it is also an important tool of bibliometrics and scientometrics. Through the citation retrieval function, you can find the early, then and recent academic documents of related research topics, and at the same time get the abstracts of papers; You can see the records of cited references, the cited situation and the records of related documents.

In the past 50 years, SCI database has developed continuously, and has become the most important large-scale database in the contemporary world, ranking first among the six famous international retrieval systems. In addition, with ISI, Social Science Citation Index (SSCI) and Art and Humanities Citation Index (A & amp； HCI).

It is not only an important retrieval reference book, but also an important basis for evaluating scientific research achievements. It has become the most authoritative and important evaluation system of basic research and applied basic research achievements in the world. It is one of the important indicators to evaluate the academic level of a country, a scientific research institution, an institution of higher learning, a journal and even a researcher.

The above contents refer to Baidu Encyclopedia-Scientific Citation Index.