The article considers the role and significance of the language personality of the future lawyer of the penitentiary system in the modern legal discourse. It is shown that the special language is primarily of a professionally oriented nature, and its tasks are to fulfill the communicative and cognitive needs of specialists of the appropriate profile. It is known that the characteristic of the lawyer's language personality should be considered in the context of the professional environment. In this regard, we consider it necessary to consider in this article the specific components of legal discourse, legal text and legal terminology. In professional activity, the oral speech of a lawyer is manifested in legal discourse, so the specificity of the recipient's understanding of the utterance in the process of communicative activity occupies a special place. A feature of the speech activity of a lawyer of the penitentiary system is a multi-faceted business communication with the purpose of changing certain characteristics of an individual or group of people and is the main means of professional activity. The article notes that the main source of creating a favorable opinion about the work of law enforcement agencies is the process of interaction between law enforcement agencies and citizens. Close interaction significantly increases the efficiency, quality and effectiveness of professional activities.