Software bugs are inevitable in the process of software development and maintenance. Software bug reports are an important bug description documents in the software maintenance process. A high-quality software bug report can effectively improve the efficiency of software bug repair. However, due to the existence of many developers, testers, and users interact with the bug tracking system and submit bug reports, the same bug may be reported by different people, resulting in a large number of duplicate software bug reports. Duplicate software bug reports will inevitably increase the workload of manual detection of duplicate bug reports, cause waste of manpower and material resources, and reduce the efficiency of bug repair. This paper systematically analyzes the research work of domestic and foreign scholars in the field of duplicated detection of bug reports in recent years by means of literature research. It mainly analyzes and summarizes the research methods, data set selection, performance evaluation, etc, and puts forward the problems and challenges in the follow-up work in this field, and our suggestions.