At present, the legal circles have different opinions on the litigation status of expert assistants. Some scholars are looking forward to the localization of British expert witnesses through legal transplantation; some scholars determine their witnesses through empirical analysis of the appearance order of expert assistants Status: Some scholars use statistics to investigate judges, lawyers, prosecutors, and other opinions on the status of expert assistants, and then integrate the data to arrive at the status of “similar to an expert.” However, continuing to deviate from the substantive law is of little significance to the construction and hypothesis of the expert assistant’s legal system. The author changed her mind and summarized and sorted out 108 cases involving the expert assistant, first of all, to clarify the actual role of the expert assistant’s opinion in the court trial. , The obvious characteristics, and then define the nature of its opinions, and infer what kind of litigation status the expert assistant should be in the legislation of our country, and then provide a new reform path for the expert assistant system.