The article analyzes the social-educational and social-psychological literature which reveals the nature and meaning of the term «socialization». Socialization is the process of assimilation of the individual throughout life of a system of knowledge, social norms and cultural values, attitudes and behavior patterns that allow him to function as a full member of the society to which he belongs. Analyzing the concept of «socialization», its close relationship with the concept of «social development» is noticed. Social development is an essential competent selection, construction and development of interaction with the outside world and people, taking into account individual to individual. This is a result, which is worth striving for. Social development of a personality occurs in two areas: socialization (acquiring social experience and its assimilation) and individualization (acquisition of autonomy, partial autonomy). Thus, the purpose of the article is to determine the characteristics of the socialization of pupils of secondary schools. In the context of the study it is indicated that the socialization of pupils of secondary schools has its own characteristics, due to the specificity of the educational process with the limited social space. The acquisition of skills of behavior, perception and assimilation of human and national values are the important factors of socialization. To ensure the active participation of each pupil in public life; to create conditions to identify themselves in practice, which needs theoretical knowledge and expressions of social skills there are priorities of educational work in secondary schools.Therefore, it is necessary to help the child to adapt in different situations, to help ensure that the content, forms of activities on the acquisition of social experience help each pupil to find himself, promotes self-determination. Therefore, socialization is defined as the processof the realizing individual needs and willingness to participate in various spheres of social relations. The socialization of pupils of secondary schools is a complex process aimed at solving problems between each other;activating students learning and cognitive activity; involving pupils in various activities according to their individual and psychological characteristics; interaction of the institution with the family.