Corpus linguistics technology is considered from the linguodidactic perspective. Discussion of the results of extensive empirical research into efficient ways of teaching EFL (English as a Foreign Language) students to interpret idioms has been presented. The research comprises three steps: ascertaining, educational and control experiments. The aim of the paper is to investigate the efficiency of corpus linguistic technology as a tool in developing corpus-based idioms' interpretation skill (CBIIS). The methodology has been tested on the EFL students of Bachelor study programs in Civil Engineering, Electrical and Electrical Power Engineering, Machine-building and Information Science and Computer Engineering implemented by Peter the Great St. Petersburg Polytechnic University in the years 2018-2019. The author shares personal experience of how to use corpus linguistics technology in foreign language teaching, presents a set of corpus-based exercises and describes the procedure of the learners' work with the basic corpus tools while interpreting idioms. The result of the educational experiment shows that the average level of the CBIIS proficiency has increased that confirms the hypothesis of the research on the effectiveness of corpus linguistic technology as a tool in teaching idioms' interpretation to EFL students.