Social engineering is a tool that can manipulate psychology to make the opponent behave in a desired way, and it is widely used not only in the ἀeld of network security, but also plays an important role in forensics. In this paper, we will start the discussion in the following order: introduce the concept of social engineering and its techniques and methods, and explore its application value in forensic investigation; list the scenarios of using social engineering techniques and methods in forensic investigation, and explore how to apply this technique in forensic investigation from a practical point of view by means of case studies; summarize the above analysis, and conclude the advantages of using social engineering in forensic investigation, and how to better apply it in the future. Ḁe above analysis is summarized, and the advantages of using social engineering in forensic investigation and how to make better use of social engineering in the future, especially in the era of big data and information technology, how to use this tool to ἀght and play with criminals.