Literary works are not created in cultural emptiness, but they are created because they are needed by humans. Literature has a dual function to entertain and benefit humans. Literature entertains by presenting beauty and imagination, besides that literature also has social functions as means to convey messages of teaching about good values. Along with the dynamics of the development of the times, the social function of teenlit has also changed. The problem of the assessment of teenlit is a phenomenon that needs to be discussed again today. This study examines the role teenlit in caring for the unity reflected in post-reform era in Indonesia. In this research, the existence of novels of teenlit is seen as a totality between novels, authors, and the people who live in the post-reform social context in Indonesia. This study is linguistic analysis about the use of speech act in teenlit novels published in the post-reform era in Indonesia. From all the teen literature novels published after the reform era, researchers chose purposively teenlit novel with consideration they had the same theme about issues of unity in diversity. The novel present figures of different ethnicities, races and religions. The data of this study are qualitative data, namely data in the form of discourse (words, phrases, paragraphs, and expressions) about unity and diversity. The analysis of the use of speech acts in teenlit novels post-reformation uses the theory of speech acts revealed by John Searle 1976.The results of the analysis show that there are three forms of speech acts relating to the message to maintain the unity that exists in teenlit novel after reformation in Indonesia: (1) Declarative, the type of speech acts that change perceptions about diversity through speech. (2) Interogative, type of speech act that quetioned by the speaker about unity and diversity. (3) Directive, type of speech act used by instructors to order the community to unite which gives orders, orders, requests and suggestions.