Exploration of "English Plus" teaching mode under the background of blockchain construction

English is the most widely used language in the world. For Chinese students, fluent English will have a positive impact on their future study and work. However, with the progress and development of science and technology, the traditional college English education model can no longer meet the needs of the current social development, so it is necessary to use advanced teaching methods such as information technology, intelligence and big data to improve the teaching quality. The inclusion of blockchain technology in the category of local innovation is the official start of the central government's promotion for the development and application of blockchain technology in China. Under this background, big data, as a new technology, can effectively improve the teaching efficiency of college English and promote the comprehensive development of college students. This paper analyses the problems existing in college English teaching and discusses the innovative strategies of college English teaching combined with the wide application of big data.