The Criminal Procedure Law has specified the court appearance of “five types of personnel”，including the victim，witness，appraiser，investigator and the person with specialized knowledge，in which the court appearance of the “five types of personnel” is the key to implement the principle of directness and verbalism，promote the reform of trial-centered criminal litigation system，and achieve procedural and substantial justice. The low appearance rate of the “five types of personnel” and the irregular hearing procedure of cases involving the court appearance of the “five types of personnel” have always been the deep-rooted problems in criminal proceedings. It’s essential to define the necessity review rules for the court appearance of the “five types of personnel”，promote the compulsory court appearance and testifying system of the witness stably，improve the court appearance supporting measures，convert the file-centered thought of judges，strengthen the publicity of the rule of law，and normalize court appearance procedures，to promote the “five types of personnel” to appear in court and testify，and achieve trial-centered and court hearing centered principle.