In e-commerce services, the influence of online comments of users on consumers' purchase decisions and business behaviors is increasingly prominent. How to use this important online text data to mine users' emotional tendencies has become the focus of academic and industry attention. After sorting out the literature, this paper combs out a fine-grained hierarchical emotional analysis business process of online comments, based on this process, the research and development status in this field is analyzed, which provides reference for future research.