At present, flipped classroom is a new teaching model in the Internet age. It makes education freer, breaks through the limitations of classroom knowledge teaching, realizes teaching tasks outside the classroom, and strengthens the communication between teachers and students to a certain extent. Taking vocal music courses in higher vocational colleges as an example, vocal music teaching has always adopted the traditional "collective singing" teaching mode, and the efficiency of classroom teaching has not been significantly improved. It provides a new development direction for vocal music teaching in colleges and universities, which not only meets the actual requirements of the new curriculum standard teaching, but also fully improves the effect of vocal music teaching in colleges and universities. Therefore, this paper mainly studies and analyzes the optimization methods and strategies of "flipped classroom" in vocal music teaching in colleges and universities.