Under the background of“Double-First Class”, the training mode of CDIO for application-oriented undergraduate for?eign language talents is to organize the second classroom of College English effectively through conception , optimize the structure of the second classroom of College English through design, improve the efficiency of the second classroom of College English through taking effective methods, and apply the knowledge learned by students in the classroom to practice through operation in or?der to improve the efficiency of students'ability of comprehensive application of English.