Problem formulation. Problem formulation. At the present stage of the educational system development, information and communication technologies (ICT) play one of the most important roles in the didactic system of the future teacher of mathematics. In the process of preparing a future mathematics teacher it is necessary from the very beginning to prepare students for future professional activities at the same time with professional competencies in terms of educational informatization. One of the effective ways of informatization of mathematics education can be the using of the Internet during the process of teaching mathematical disciplines. Because of the fact that every student cannot imagine his life without the Internet, it is possible to move from passive presentation of material to active through the tools of the Internet, which will significantly increase the interest in learning the discipline and improve learning outcomes. The aim of the article is to analyze the issues of didactic possibilities of ICT tools in mathematical education of future mathematics teachers. Materials and methods. The following methods were used to conduct this research: analysis of psychological and pedagogical and methodological literature, systematization and generalization of different views on determining the main ideas, types and methods of construction, as well as the use of Wiki technology in training future mathematics teachers. Results. Based on the analysis of the didactic possibilities of ICT tools in mathematics education of future mathematics teachers, it was determined that among the large number of Internet resources, the Web 2.0 service deserves special attention. This service is a block of social services (blogs and microblogs (Twitter, Blog, Live Jornal), social networks and social presentation systems (viber, Telegram, Instagram, Facebook), wiki projects (Wikipedia, Wikiversity, Wikibooks, Wiktionary) and management systems content (Moodle, Jomla, etc.); social media repositories (YouTube, etc.)), which allow students not only to receive but also to create information, information resources. For example, a blog in mathematics education can be used as a platform for information exchange, consultation, research and more. An equally interesting resource is the Wiki service, the use of which achieves the greatest effect in the independent work of students in the process of creating educational and research projects. Using Web 2.0 tools it is possible to create small training modules on a specific problem, illustrated with visualized examples with animation. The set of such modules can be a distance learning course that students can access at any time. The author also considers the directions and some possible types of use of Internet services in the training of mathematics teachers. Conclusions. An analysis of the didactic possibilities of ICT in mathematical education of future mathematics teachers showed that among all possible Internet services, Wiki has all main features and capabilities of Web 2.0 technology, and therefore is well suited for organizing an educational network of future maths teachers. Thus, the active use of various Internet services in the process of preparing future mathematics teachers turns the usual learning process into a joint creative activity in which all participants actively cooperate in the process of learning and acquiring new knowledge, which significantly increases the efficiency of education.