In order to better adapt to the relevant requirements of blended teaching in colleges and universities under the ecological environment and in the “Internet +” era, the “online + offline” blended teaching mode of college English in the Internet era is innovated to further highlight the subjectivity of students in the process of English learning status. First, this study deeply understands the current situation and problems of College English teaching from the perspective of the Internet by means of a questionnaire survey. On this basis, with the construction of the English teaching concept of “student-centered and teacher-led” as the core, this study puts forward and designs the “online and offline” mixed teaching mode of College English based on the support of mobile network technology. Through the teaching experiment, it is found that the total score of students in the mixed teaching mode is 6 points higher than that before, and the scores for English Cloze, writing, and reading are 2.75 points, 1.3 points, and 1.134 points, respectively. The feasibility and remarkable effect of the mixed teaching mode are verified.