The words and texts of the students are the combination of thoughts and knowledge of the students during their sentence in prison. Because the language is limited by a specific space, they are more inclined to use concealed or open words to vent and express. This is the colorful expression of the students' emotions and desires , Is the carrier of students' will and conviction. In fact, the cultural symbols created by the students and students are everywhere in the prison, and the existence of students' bodies and souls is revealed in the deep meaning world of the cultural symbols. Through the analysis of the trainee LNW and trainee LJ examples, people are deeply aware of the importance of prison culture. The construction of prison culture is based on the self-rational understanding of the prison, the transformation and construction of its own material culture, system culture and spiritual culture, and the healthy development of criminal personality. <<