Abstract:Identification of highly similar scientific projects is an essential way of ensuring fairness of project approval. In recent years, it has been one of hot topics in science and technology management. This paper reviewed identification methods of highly similar scientific projects in a systemic way, which provided effective knowledge and clues for other researchers to quickly understand relevant background and methods. Firstly, a concept of identification of highly similar scientific projects and its general realization process were described. And then, we summarized common methods for text pre-processing, feature extraction, model construction and similarity discrimination, including their advantages and disadvantages. Finally, future development trends were discussed for identification methods of highly similar scientific projects.