The article describes the general characteristic of foreign language competence in the letter of future teachers of primary school and defined it as the ability to plan, implement and correct its own communicative behaviour during the generation and variation of foreign language speech in different types of written statements in accordance with a particular communication situation. The purpose of this article is to investigate the issue of developing future primary school teachers’ foreign language competence in writing in the context of modern requirements and trends. The goals and stages of writing skills, communicative abilities and characteristic features of the letter are determined. The author notes that the success of developing of foreign language competence in writing depends on the level of development of writing skills, speech skills, the amount of acquired and learned knowledge of this type of communication and the dynamic interaction of these components on the basis of general communicative abilities. The system of exercises is presented. The system of exercises for developing the foreign language competence in writing includes three subsystems of the exercises: subsystem 1 – for the writing skills forming; subsystem 2 – for the speech writing skills forming (lexical, grammatical and skills of understanding and using linguistic means); subsystem 3 – for the development of writing skills. Each subsystem includes several exercise groups. A brief description of means of formation and control of the level of formation of foreign language competence in writing of future primary school teachers is given. The author distinguishes the main functional and semantic types of writing: description, message / story, reasoning. The academic writing genres include plans, retellings, annotations, abstracts, reports, reviews, articles, projects, essays.