Self-efficacy in English language learning is directly correlated with the success of the students in learning English, the models they follow at each level, the encouragement and suggestions received by their groups, and the evaluations their teachers provide them. As an innovation for the traditional teaching method, the flipped classroom teaching model can affect the formation of self-efficacy in English language learning from the above four aspects. It has a theoretically positive promotion of self-efficacy. The study employed a quasi-experimental approach and semi-structured interviews to investigate whether the flipped classroom teaching model has a positive impact on self-efficacy in English language learning of the students of Chinese higher vocational colleges. The results showed that flipped classroom had a significant positive impact on students' self-efficacy in English language learning.