In recent years, many colleges and universities in China have put bilingual teaching into practice. However, the actual effect is not good enough. Bilingual education in colleges and universities is experiencing many bottlenecks, such as lacking of professional teachers, proper teaching mechanism, realistic course selection, original editions of materials and so on. The innovation of traditional bilingual teaching should begin with teaching mechanism and teaching methods. Teaching mechanism innovation includes four areas： the innovation of teaching management mechanism, faculty building mechanism, teaching evaluation mechanism and teaching incentives mechanism. While teaching methods innovation includes three aspects： in-classroom teaching innovation, extracurricular practice teaching innovation and network teaching innovation.