The paper aims to explore the impact of interdisciplinarity on sight translation training in scientific and technical domains. The authors concentrate on the distinctive features of transdisciplinarity and explain the concept of "weak" (used as a practical means) and "strong" transdisciplinarity (complex impact through several levels of reality). 80 future translators/interpreters took part in the research. The results of educational process observations during sight translation classes are presented. Three levels of competences in translating and interpreting (high, medium and low) are identified to conduct the quantitative and qualitative analysis of experimental data during sight translation training. The theoretical and practical analyses, generalisation and mathematical statistics methods were used to stipulate the impact of transdisciplinarity on sight translation training. This research has clearly shown that application of a transdisciplinary approach gives future translators/interpreters opportunity to receive cross-sectorial training in specific fields. Transdisciplinary in sight translation trainings has a positive impact on the development of students' professional identity.